OP Z midi hang/not recognizing ableton

I have big problems when using my Opz as a sequencer with Ableton with midi hang and also it not recognizing half of my inputs.
The weird thing is that two days ago I used the exact same setup and it worked perfectly fine (besides the clock sync that also never works for me) and I did not change any settings since then.

Did anyone ever experience similar problems?

Edit: While doing some testing with a midi monitor I found out the the opz often doesn’t recognize the input signal thats why it often doesn’t stop playing or often won’t play. But I still found no solution.

I don’t use Ableton but “not recognizing half of my inputs” could mean part of your issue is your MIDI settings. What firmware version are you using, and what are the current MIDI settings on your OP-Z?