Cannot rapidly change the Homematic setpoint temperature

I have a Homematic IP heating group and have defined to use a stepper card for the setpoint temperature.
Now when I try to change the temp by clicking the “+” button several times, it fails to get to my target, if I click too rapidly.
This is form the events log:

2022-04-16 17:05:00.241 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'HM_HeizungToilette_1_SetPointTemperature' received command 20.5
2022-04-16 17:05:00.242 [INFO ] [penhab.event.ItemStatePredictedEvent] - Item 'HM_HeizungToilette_1_SetPointTemperature' predicted to become 20.5
2022-04-16 17:05:00.243 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 20 °C to 20.5 °C
2022-04-16 17:05:00.739 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'HM_HeizungToilette_1_SetPointTemperature' received command 21
2022-04-16 17:05:00.740 [INFO ] [penhab.event.ItemStatePredictedEvent] - Item 'HM_HeizungToilette_1_SetPointTemperature' predicted to become 21
2022-04-16 17:05:00.741 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 20.5 °C to 21 °C
2022-04-16 17:05:01.207 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'HM_HeizungToilette_1_SetPointTemperature' received command 21.5
2022-04-16 17:05:01.208 [INFO ] [penhab.event.ItemStatePredictedEvent] - Item 'HM_HeizungToilette_1_SetPointTemperature' predicted to become 21.5
2022-04-16 17:05:01.208 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 21 °C to 21.5 °C
2022-04-16 17:05:01.676 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'HM_HeizungToilette_1_SetPointTemperature' received command 22
2022-04-16 17:05:01.677 [INFO ] [penhab.event.ItemStatePredictedEvent] - Item 'HM_HeizungToilette_1_SetPointTemperature' predicted to become 22
2022-04-16 17:05:01.679 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 21.5 °C to 22 °C
2022-04-16 17:05:01.948 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 22 °C to 20.5 °C
2022-04-16 17:05:02.160 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'HM_HeizungToilette_1_SetPointTemperature' received command 22.5
2022-04-16 17:05:02.161 [INFO ] [penhab.event.ItemStatePredictedEvent] - Item 'HM_HeizungToilette_1_SetPointTemperature' predicted to become 22.5
2022-04-16 17:05:02.162 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 20.5 °C to 22.5 °C
2022-04-16 17:05:02.354 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 22.5 °C to 21 °C
2022-04-16 17:05:02.670 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 21 °C to 21.5 °C
2022-04-16 17:05:02.686 [INFO ] [openhab.event.ItemCommandEvent      ] - Item 'HM_HeizungToilette_1_SetPointTemperature' received command 21.5
2022-04-16 17:05:02.686 [INFO ] [penhab.event.ItemStatePredictedEvent] - Item 'HM_HeizungToilette_1_SetPointTemperature' predicted to become 21.5
2022-04-16 17:05:02.989 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 21.5 °C to 22 °C
2022-04-16 17:05:03.275 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 22 °C to 22.5 °C
2022-04-16 17:05:03.563 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'HM_HeizungToilette_1_SetPointTemperature' changed from 22.5 °C to 21.5 °C

Any hints? Thanks!

Created an issue: [homematic] Cannot rapidly change the Homematic setpoint temperature · Issue #12645 · openhab/openhab-addons · GitHub