Crash almost every time i try delete anything on map or edit animation

After i transferred my project from 4.22 to 4.23 editor started crashing constantly. Right now i have specific nodes in blueprints i cant delete at all. I have some object on map i cant delete too. Changing animations leads to crash in 100% cases. HELP!!! My PC is ryzen 2600, RX580 8GB, 16GB RAM, SSD. My project consumes only 2GB of ram and 500mg of video memory so don’t tell me that its memory issues.

VIDEO of CRASH - YouTube

Undo causes crash TOO

I had this for one level, in the end I had to make a new level and copy/paste everything from one to the other ( it wasn’t as bad as it sounds ). Is it just one level?

No , its happeining on every map of my project. BTW i cant delete Fabrik nodes too. My friend have same issue at 4.22 and while i still struggling he got into psychosis and ended up in ER after this BUG ruined his project.

Nice… hmm…

Did you back up your 4.22 before all this?

Yeah i did, and then spend two moths making AI and special effects, and then noticed that i cant work on map anymore, BTW friend have same issue with his project at 4.22