Ah of course, sounds plausible, my project is already pretty big.
Merging scripts together sound like the opposite of what a developer should do for keeping clean code. ^^'

I downgraded to Unity 2022.1.24 now and it works again. But I still hope Unity will fix these problems. Did you already report these bugs officially, so others can "sign" (write into the bug report that they also have the problem), to express a higher urgency?

Thank you very much!