ok, set log to debug, “deactivated” [thing]:meter1#currentWatts
, waited some time and reactivated the meter1 channel.
as you can see, between link removed and link added there are no updates for any times:
2020-12-27 09:59:42.105 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from 377.6 to 385.1
2020-12-27 09:59:42.142 [vent.ItemStateChangedEvent] - Shelly_EM3_accWatts changed from 1360.9 W to 1374.1 W
2020-12-27 09:59:44.164 [temChannelLinkRemovedEvent] - Link 'Shelly_EM3_Watts3 => shelly:shellyem3:84cca8ad12a6:meter3#currentWatts' has been removed.
2020-12-27 09:59:55.022 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16245): {"G":[[0,9103,0],[0,1101,0],[0,4105,564.14],[0,4106,162389.4],[0,4107,108987.4],[0,4108,234.30],[0,4109,3.97],[0,4110,0.61],[0,4205,428.21],[0,4206,79406.1],[0,4207,97461.9],[0,4208,239.46],[0,4209,3.35],[0,4210,0.53],[0,4305,382.30],[0,4306,38384.6],[0,4307,637.3],[0,4308,231.48],[0,4309,3.54],[0,4310,0.47],[0,6102,0]]}
2020-12-27 09:59:55.025 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,564.14],[0,4106,162389.4],[0,4107,108987.4],[0,4108,234.30],[0,4109,3.97],[0,4110,0.61],[0,4205,428.21],[0,4206,79406.1],[0,4207,97461.9],[0,4208,239.46],[0,4209,3.35],[0,4210,0.53],[0,4305,382.30],[0,4306,38384.6],[0,4307,637.3],[0,4308,231.48],[0,4309,3.54],[0,4310,0.47],[0,6102,0]]} (serial=33306)
2020-12-27 09:59:55.027 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:00:10.024 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16246): {"G":[[0,9103,0],[0,1101,0],[0,4105,559.62],[0,4106,162398.9],[0,4107,108987.4],[0,4108,233.75],[0,4109,3.94],[0,4110,0.61],[0,4205,423.48],[0,4206,79413.2],[0,4207,97461.9],[0,4208,239.55],[0,4209,3.33],[0,4210,0.53],[0,4305,383.07],[0,4306,38390.9],[0,4307,637.3],[0,4308,231.93],[0,4309,3.52],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:00:10.027 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,559.62],[0,4106,162398.9],[0,4107,108987.4],[0,4108,233.75],[0,4109,3.94],[0,4110,0.61],[0,4205,423.48],[0,4206,79413.2],[0,4207,97461.9],[0,4208,239.55],[0,4209,3.33],[0,4210,0.53],[0,4305,383.07],[0,4306,38390.9],[0,4307,637.3],[0,4308,231.93],[0,4309,3.52],[0,4310,0.47],[0,6102,0]]} (serial=33306)
2020-12-27 10:00:10.030 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:00:25.031 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16247): {"G":[[0,9103,0],[0,1101,0],[0,4105,558.15],[0,4106,162398.9],[0,4107,108987.4],[0,4108,234.56],[0,4109,3.95],[0,4110,0.60],[0,4205,430.70],[0,4206,79413.2],[0,4207,97461.9],[0,4208,238.88],[0,4209,3.37],[0,4210,0.54],[0,4305,381.52],[0,4306,38390.9],[0,4307,637.3],[0,4308,231.07],[0,4309,3.52],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:00:25.033 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,558.15],[0,4106,162398.9],[0,4107,108987.4],[0,4108,234.56],[0,4109,3.95],[0,4110,0.60],[0,4205,430.70],[0,4206,79413.2],[0,4207,97461.9],[0,4208,238.88],[0,4209,3.37],[0,4210,0.54],[0,4305,381.52],[0,4306,38390.9],[0,4307,637.3],[0,4308,231.07],[0,4309,3.52],[0,4310,0.47],[0,6102,0]]} (serial=33306)
2020-12-27 10:00:25.035 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:00:34.038 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16248): {"G":[[0,9103,0],[0,1101,0],[0,4105,564.17],[0,4106,162398.9],[0,4107,108987.4],[0,4108,233.60],[0,4109,3.93],[0,4110,0.61],[0,4205,411.74],[0,4206,79413.2],[0,4207,97461.9],[0,4208,238.64],[0,4209,3.33],[0,4210,0.52],[0,4305,389.95],[0,4306,38390.9],[0,4307,637.3],[0,4308,233.48],[0,4309,3.57],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:00:34.040 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,564.17],[0,4106,162398.9],[0,4107,108987.4],[0,4108,233.60],[0,4109,3.93],[0,4110,0.61],[0,4205,411.74],[0,4206,79413.2],[0,4207,97461.9],[0,4208,238.64],[0,4209,3.33],[0,4210,0.52],[0,4305,389.95],[0,4306,38390.9],[0,4307,637.3],[0,4308,233.48],[0,4309,3.57],[0,4310,0.47],[0,6102,0]]} (serial=33562)
2020-12-27 10:00:34.042 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:00:47.044 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16249): {"G":[[0,9103,0],[0,1101,0],[0,4105,559.92],[0,4106,162398.9],[0,4107,108987.4],[0,4108,232.97],[0,4109,3.93],[0,4110,0.61],[0,4205,415.92],[0,4206,79413.2],[0,4207,97461.9],[0,4208,239.59],[0,4209,3.35],[0,4210,0.52],[0,4305,395.52],[0,4306,38390.9],[0,4307,637.3],[0,4308,233.63],[0,4309,3.57],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:00:47.047 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,559.92],[0,4106,162398.9],[0,4107,108987.4],[0,4108,232.97],[0,4109,3.93],[0,4110,0.61],[0,4205,415.92],[0,4206,79413.2],[0,4207,97461.9],[0,4208,239.59],[0,4209,3.35],[0,4210,0.52],[0,4305,395.52],[0,4306,38390.9],[0,4307,637.3],[0,4308,233.63],[0,4309,3.57],[0,4310,0.47],[0,6102,0]]} (serial=33818)
2020-12-27 10:00:47.049 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:01:02.051 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16250): {"G":[[0,9103,0],[0,1101,0],[0,4105,556.57],[0,4106,162408.2],[0,4107,108987.4],[0,4108,234.14],[0,4109,3.93],[0,4110,0.60],[0,4205,423.70],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.12],[0,4209,3.38],[0,4210,0.52],[0,4305,391.35],[0,4306,38397.3],[0,4307,637.3],[0,4308,232.73],[0,4309,3.54],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:01:02.054 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,556.57],[0,4106,162408.2],[0,4107,108987.4],[0,4108,234.14],[0,4109,3.93],[0,4110,0.60],[0,4205,423.70],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.12],[0,4209,3.38],[0,4210,0.52],[0,4305,391.35],[0,4306,38397.3],[0,4307,637.3],[0,4308,232.73],[0,4309,3.54],[0,4310,0.47],[0,6102,0]]} (serial=33818)
2020-12-27 10:01:02.057 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:01:17.056 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16251): {"G":[[0,9103,0],[0,1101,0],[0,4105,561.40],[0,4106,162408.2],[0,4107,108987.4],[0,4108,233.84],[0,4109,3.93],[0,4110,0.61],[0,4205,417.29],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.35],[0,4209,3.37],[0,4210,0.52],[0,4305,395.24],[0,4306,38397.3],[0,4307,637.3],[0,4308,233.04],[0,4309,3.59],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:01:17.058 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,561.40],[0,4106,162408.2],[0,4107,108987.4],[0,4108,233.84],[0,4109,3.93],[0,4110,0.61],[0,4205,417.29],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.35],[0,4209,3.37],[0,4210,0.52],[0,4305,395.24],[0,4306,38397.3],[0,4307,637.3],[0,4308,233.04],[0,4309,3.59],[0,4310,0.47],[0,6102,0]]} (serial=33818)
2020-12-27 10:01:17.061 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:01:32.066 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16252): {"G":[[0,9103,0],[0,1101,0],[0,4105,560.68],[0,4106,162408.2],[0,4107,108987.4],[0,4108,233.88],[0,4109,3.93],[0,4110,0.61],[0,4205,416.28],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.20],[0,4209,3.34],[0,4210,0.52],[0,4305,390.91],[0,4306,38397.3],[0,4307,637.3],[0,4308,233.00],[0,4309,3.56],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:01:32.069 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,560.68],[0,4106,162408.2],[0,4107,108987.4],[0,4108,233.88],[0,4109,3.93],[0,4110,0.61],[0,4205,416.28],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.20],[0,4209,3.34],[0,4210,0.52],[0,4305,390.91],[0,4306,38397.3],[0,4307,637.3],[0,4308,233.00],[0,4309,3.56],[0,4310,0.47],[0,6102,0]]} (serial=33818)
2020-12-27 10:01:32.072 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:01:47.074 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16253): {"G":[[0,9103,0],[0,1101,0],[0,4105,568.23],[0,4106,162408.2],[0,4107,108987.4],[0,4108,233.54],[0,4109,3.95],[0,4110,0.62],[0,4205,409.79],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.44],[0,4209,3.35],[0,4210,0.51],[0,4305,397.63],[0,4306,38397.3],[0,4307,637.3],[0,4308,233.63],[0,4309,3.63],[0,4310,0.47],[0,6102,0]]}
2020-12-27 10:01:47.077 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,568.23],[0,4106,162408.2],[0,4107,108987.4],[0,4108,233.54],[0,4109,3.95],[0,4110,0.62],[0,4205,409.79],[0,4206,79420.2],[0,4207,97461.9],[0,4208,239.44],[0,4209,3.35],[0,4210,0.51],[0,4305,397.63],[0,4306,38397.3],[0,4307,637.3],[0,4308,233.63],[0,4309,3.63],[0,4310,0.47],[0,6102,0]]} (serial=33818)
2020-12-27 10:01:47.079 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:01:58.230 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from NULL to 385.1
2020-12-27 10:01:58.249 [.ItemChannelLinkAddedEvent] - Link 'Shelly_EM3_Watts3-shelly:shellyem3:84cca8ad12a6:meter3#currentWatts' has been added.
2020-12-27 10:02:02.082 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16254): {"G":[[0,9103,0],[0,1101,0],[0,4105,574.84],[0,4106,162417.6],[0,4107,108987.4],[0,4108,234.89],[0,4109,3.97],[0,4110,0.62],[0,4205,408.69],[0,4206,79427.2],[0,4207,97461.9],[0,4208,239.50],[0,4209,3.31],[0,4210,0.52],[0,4305,386.64],[0,4306,38403.8],[0,4307,637.3],[0,4308,233.50],[0,4309,3.62],[0,4310,0.46],[0,6102,0]]}
2020-12-27 10:02:02.085 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,574.84],[0,4106,162417.6],[0,4107,108987.4],[0,4108,234.89],[0,4109,3.97],[0,4110,0.62],[0,4205,408.69],[0,4206,79427.2],[0,4207,97461.9],[0,4208,239.50],[0,4209,3.31],[0,4210,0.52],[0,4305,386.64],[0,4306,38403.8],[0,4307,637.3],[0,4308,233.50],[0,4309,3.62],[0,4310,0.46],[0,6102,0]]} (serial=33818)
2020-12-27 10:02:02.089 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:02:02.108 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel meter3#currentWatts updated with 386.6 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:02.118 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 1 channels updated from CoIoT status, serial=33818
2020-12-27 10:02:02.114 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from 385.1 to 386.6
2020-12-27 10:02:03.105 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel meter3#currentWatts updated with 386.3 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:03.120 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel device#accumulatedWatts updated with 1368.8 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:03.141 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel device#accumulatedWTotal updated with 280.249 kWh (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:03.111 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from 386.6 to 386.3
2020-12-27 10:02:03.151 [vent.ItemStateChangedEvent] - Shelly_EM3_accWatts changed from 1374.1 W to 1368.8 W
2020-12-27 10:02:03.155 [vent.ItemStateChangedEvent] - Shelly_EM3_accTotal changed from 280.180 to 280.249
2020-12-27 10:02:03.568 [vent.ItemStateChangedEvent] - Shelly_EM3_consumption changed from 0.023 to 0.069
2020-12-27 10:02:12.390 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel meter3#currentWatts updated with 390.6 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:12.400 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel device#accumulatedWatts updated with 1371.0 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:12.399 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from 386.3 to 390.6
2020-12-27 10:02:12.424 [vent.ItemStateChangedEvent] - Shelly_EM3_accWatts changed from 1368.8 W to 1371.0 W
2020-12-27 10:02:17.085 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Message from /192.168.178.212:5683 (MID=16255): {"G":[[0,9103,0],[0,1101,0],[0,4105,563.13],[0,4106,162417.6],[0,4107,108987.4],[0,4108,235.33],[0,4109,3.94],[0,4110,0.61],[0,4205,416.74],[0,4206,79427.2],[0,4207,97461.9],[0,4208,238.97],[0,4209,3.35],[0,4210,0.52],[0,4305,385.48],[0,4306,38403.8],[0,4307,637.3],[0,4308,232.73],[0,4309,3.57],[0,4310,0.46],[0,6102,0]]}
2020-12-27 10:02:17.089 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: CoIoT Sensor data {"G":[[0,9103,0],[0,1101,0],[0,4105,563.13],[0,4106,162417.6],[0,4107,108987.4],[0,4108,235.33],[0,4109,3.94],[0,4110,0.61],[0,4205,416.74],[0,4206,79427.2],[0,4207,97461.9],[0,4208,238.97],[0,4209,3.35],[0,4210,0.52],[0,4305,385.48],[0,4306,38403.8],[0,4307,637.3],[0,4308,232.73],[0,4309,3.57],[0,4310,0.46],[0,6102,0]]} (serial=33818)
2020-12-27 10:02:17.091 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 21 CoAP sensor updates received
2020-12-27 10:02:17.104 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel meter3#currentWatts updated with 385.5 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:17.110 [DEBUG] [elly.internal.coap.ShellyCoapHandler] - shellyem3-84cca8ad12a6: 1 channels updated from CoIoT status, serial=33818
2020-12-27 10:02:17.111 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from 390.6 to 385.5
2020-12-27 10:02:18.643 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel meter3#currentWatts updated with 388.2 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:18.655 [DEBUG] [lly.internal.util.ShellyChannelCache] - shellyem3-84cca8ad12a6: Channel device#accumulatedWatts updated with 1370.0 W (type class org.eclipse.smarthome.core.library.types.QuantityType).
2020-12-27 10:02:18.649 [vent.ItemStateChangedEvent] - Shelly_EM3_Watts3 changed from 385.5 to 388.2
2020-12-27 10:02:18.676 [vent.ItemStateChangedEvent] - Shelly_EM3_accWatts changed from 1371.0 W to 1370.0 W