@Smanar @Mimiix: I would not be able to circle the devices because I have the delays on all items. If I send a light on via openhab it can take 10-20 seconds till the Hue bulb turns on. If I do it via a Aqara switch the time is around 20-50 seconds…
As I did not find a solution with 2.24.2, 2.25.3 and 2.26.1 I now installed 2.23.02 and everything is running perfectly again. It just takes milliseconds to turn on the lights and the CPU of the docker container is now only 3%. 
To double check I then did start the container again with deconz 2.26.1. The Container has >15% CPU load seems to go till over 20% in the next hour. And the delays are back. So something changed in 2.24.2, 2.25.3 or 2.26.1 which makes the system not stable anymore.
I will have to stick with 2.23.02 till a solution is found.
I did share my log already and don’t now what else I could do to assist.
Can anyone inform the developers of this issue?