I will leave this reply here because I found the issue in my case. The tooltips were not working because of my antivirus application. It has some working profiles that were disabling the tool-tips in some scenarios.
This topic can be closed.
In the end I reinstalled Windows 10(it was 3 years old installation). The strange part is that after installation the tooltips worked and everything worked fine until today. Now the tooltips are not working anymore.
I can't seems to understand why this is happening. I only installed Hyper-V...
I installed hwinfo64 on my main host and for some reason the tooltips are not showing(the option "Show ToolTips is on in settings). I checked the dotnet versions that are installed and everything looks fine (.Net 4.8).
I noticed that when it starts the application window is flickering, I'm not...