When i run ANY of my projects first time after Unity start, all works fine.
At second run, none of the UI buttons doing their job.
No error messages.
If i close Unity and starting it again, all works fine for first run (in all projects) but not after.
This bug appeared between two starts of Unity. All worked fine yesterday, when i started today unity i faced with this problem right after.
Tried to apply patches, revert from 5.2.1 back to 5.2, relocate the projects, still no clue.
Any ideas, tips?