Links between items and mqtt channels get removed automatically

Hi guys,

since yesterday, after I cleaned the cache and temp, and restarted OH2, the links between my Items and MQTT channels are getting removed. Thus, I cannot retrieve any MQTT messages anymore. The log shows following:

**2020-11-29 19:38:37.521 [temChannelLinkRemovedEvent] - Link 'Maestro_Power_Level => mqtt:topic:Maestro:mczStatus' has been removed.**

2020-11-29 19:38:37.524 [temChannelLinkRemovedEvent] - Link ‘Maestro_Fan_State => mqtt:topic:Maestro:mczStatus’ has been removed.

2020-11-29 19:38:37.527 [temChannelLinkRemovedEvent] - Link ‘Maestro_Control_Mode => mqtt:topic:Maestro:mczStatus’ has been removed.

2020-11-29 19:38:37.529 [temChannelLinkRemovedEvent] - Link ‘MyMaestro_ECO_Mode2 => mqtt:topic:Maestro:mczStatus’ has been removed.

2020-11-29 19:38:37.531 [temChannelLinkRemovedEvent] - Link ‘Maestro_Text_Raw => mqtt:topic:Maestro:mczStatus’ has been removed.

2020-11-29 19:39:30.123 [hingStatusInfoChangedEvent] - ‘mqtt:broker:MqttBrokerMcz’ changed from UNINITIALIZED to INITIALIZING

2020-11-29 19:39:30.282 [hingStatusInfoChangedEvent] - ‘mqtt:broker:MqttBrokerMcz’ changed from INITIALIZING to OFFLINE

2020-11-29 19:39:32.207 [hingStatusInfoChangedEvent] - ‘mqtt:broker:MqttBrokerMcz’ changed from OFFLINE to ONLINE

2020-11-29 19:39:32.240 [me.event.ThingUpdatedEvent] - Thing ‘mqtt:broker:MqttBrokerMcz’ has been updated.

2020-11-29 19:39:34.982 [hingStatusInfoChangedEvent] - ‘mqtt:topic:Maestro’ changed from UNINITIALIZED to INITIALIZING

2020-11-29 19:39:35.113 [hingStatusInfoChangedEvent] - ‘mqtt:topic:Maestro’ changed from INITIALIZING to ONLINE

To the configuration:
All my things, channels and items are configurated using files. After I got this problem, I’ve upgraded to the newest stable branch via openhabian-config. Openhab2 is running on openhabian (rasp4).

I can still “send” MQTT messages (pressing a switch), but receiving seems not to work. Also when I add a new item, and link it to the same channel, it is not working. I’ve restarted Openhab 2-3 times since yesterday. Sometimes the items where missing, now, the items are there, but still no MQTT message is retrieved…

Some Ideas what’s going wrong here?

Somehow, it is solved now. I am not quite sure what exactly solved it, but I’ve added some additional channels, renamed the thing, and deleted/added the channels again… And now, it is working fine again…

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