I can not, I have no idea what causes this bug. I try to track it down since over hour, because what I did was actually not a solution - now I'm unable to save data from inspector... When I click "output" in bottom-bar I see it detects changes to title of dialog window, I then press ctrl+s to save scene including dialog window and it thinks it saved it, but when I close and open scene nothing is saved.......
I made sure I have disk space, I am logged as user "a" , run program and own project files with same user "a", so it's not system permissions issue... I'm starting to lose my mind. But deleting project.binary removed one problem and caused another problem instead. Now I can add/remove input actions freely, but object inspector just doesn't save anything.
I also ran godot from console and saw no interesting prompts that could hint anything.
I now deleted all user data and editor data - so I'm having like clear godot installation, I deleted every file in project that does not contain information written by me (.import s mostly, but some other files too) - and problem still persists, so ... I'm kind of sure the problem is somewhere in project folder... I tried again running it from console with --verbose and --debug flags, but still it didn't print anything worrisome... But it doesn't work.