Not sure it is the right place to report bugs but here it is:
I've encounter mouse issues recently. I was not able to use right click to change tools. When doing so the popup was flickering and disappearing. The only way to display the popup and change tools was to hold left+right mouse buttons for a few seconds...
After searching for a solution, I found out some softwares could cause the issue (synergy: not installed, teamviewer: closing the app did not solve the issue).
I eventually found out what was causing this: I'm using a dual screen setup, and I placed all the panels on the secondary monitor (history, layers, navigation, timeline, actions, tools...).
As soon as I place all these panels on the primary monitor, right clicking to change tools works again...
I hope this will help someone, or help the devs fixing this