Hi,
had following in the log:
2022-04-15 16:51:18.311 [WARN ] [ternal.handler.HomematicThingHandler] - Channel not found for datapoint 'SEQ1034420:2#STATE'
2022-04-15 16:51:18.323 [WARN ] [ternal.handler.HomematicThingHandler] - Channel not found for datapoint 'SEQ1034420:2#WORKING'
and found this solution:
BR
PeterK