I am working in Revit 2019 and periodically it stops registering keyboard shortcuts.

I am working remotely.
I tried both the laptop and external keyboards.
When I enter a shortcut and hit enter, it pulls up the last used command. Esc key works. I can still enter text. Seems like only shortcuts are affected.
I have not modified the standard shortcuts.
Other programs are not affected.
I have to restart Revit to get the keyboard to work again.

Any ideas how to fix this?