Unable to Shut down VS: LibMan causing operation blocking user input

[justcla]

After performing some LibMan operations, Visual Studio will not shut down gracefully.

Also, we notice major UI delays and some keyboard presses not working (ie. Backspace).
Fix when Alt-Tabbing away and then back again.

[jodavis]

Demoting this to P2 because we haven't heard from customers hitting it, and we think it might have been an internal build problem. But please speak up if you're experiencing this problem.

[open-environment]

I am receiving this error and definitely suspect it is due to LibMan. 15.9.6. Exact same symptoms also ("keyboard presses not working (ie. Backspace"). But unlike OP, alt-tabbing away and back doesn't resolve. I need to shut down vs and reopen each time.

[ygoe]

Joining the queue. If LibMan hangs again because it can't download a package during build, the build can't be cancelled. Ctrl+Break and the corresponding menu command do nothing. The build icon in the status bar keeps on playing. I'm pretty sure I couldn't close Visual Studio during that time either. So it's not an internal issue, it is indeed public and sitting at the users.