I'm running a Linux VM on windows with Hyper-V and connect via a remote desktop session. It often happens that the Alt-key appears to remain pressed after I use a keyboard shortcut involving both, Alt and Shift. If I press Alt again, everything works fine but it is pretty annoying because various keyboard shortcuts are triggered when I continue typing without pressing Alt again after the initial shortcut that causes the problem.
The problem is not related to a specific application but is reproducible in different apps.
I'm using the xfce desktop and xrdp.