ok glass, badspot made the
bug thread for a reason.
and it's not the shader update's fault, it's the add-on server switch's.
when switching to a server when in-game, and the menu pops up in-game then select
start a game and then select
back or click
esc.
that's just an alternative way of getting out of the menu navigation if that happens in-game, i don't think it will be fixed any time soon.