If Premiere is acting weird open Premiere with holding down alt+shift.
If that does not help file a bugreport.
You are the second one who reported this assuming you are one PPCC.
Have you used the "Sync Now" option?
The reason I asked is that I tried that option but typed in the wrong email address and that resulted in the keyboard shortcut window not opening on my laptop.
I got a "Sync failed" error message but after I typed in the right address on my main computer, syncing was successful and the keyboard shortcut window reappeared
on the laptop.