i don’t see anything wrong with your config…
Maybe there is an issue with KNX2… not sure.
I saw some posts from other people also experiencing timeouts on GroupRead operations with KNX2 while never had a problem with KNX1…
You can try to open up a github issue here: https://github.com/openhab/openhab2-addons/issues
Ps: Use Code Fences to post configs/logs/etc