Sometimes when switching from creative to spectator with F3+N, my game would get locked holding F3.  There wouldn't be any info on my screen but the shortcuts like F3+A to reload chunks would be triggered when I was trying to move left. 

this bug isnt exclusive to F3+N it works with all of the shortcuts if you press them enough times it however doesnt work with any random letter+F3 so it most likely isnt on my end

How To Reproduce:

1. Press F3+N
2.  Press A,B,C,D,F,G,H,I,N,P,Q,T,esc,or F4

i couldnt get my friend to try it but i suffer from it no matter if im in a survival world or a creative world and the date created and number of command block running doesnt matter either

I haven't been able to test if this bug happens when using the F3+F4 Gamemode switcher.