Hi @Dim!
Thanks for your reply & sorry for not using forum-syntax. You see what’s really weird is that I can actually send commands on “Channel_S2_14” (that are my office spots), but the latency between switching and actually a reaction from my actuator is approx. 8 seconds. If I immediately want to turn them off again, that command is basically “lost” and if I wait, lets say 10 seconds, it takes again some seconds until the light goes off again.
If I perform the same task with my running OH2.2 installation (/w KNX 1.X binding), everything is very performant.
Regarding your idea with the github issue - I found https://github.com/openhab/openhab2-addons/issues/3364, the guy who opened the thread received the same errors as me. It was updated on 26th March but I’m afraid it’s still open. I’ll keep my eyes open, if I find a solution I’ll post it here of course.