Level 3 third key not spawning

Me and my buddies were having some fun and running through them backrooms.
Then we got to level 3, the abandoned office, and the third key was not be found. at all.
Like, we searched absolutely every corner and drawer 5 times and made a new lobby another 5 times and kept trying to find the third key.
I'm pretty sure this is a glitch but tell me if i missed some update or something, but i doubt i did.