e.g. Are Sniper robots unable to fire their primary weapon if they are set on fire? What about other effects?
I am 99% sure that fire has the same effects on robots in MvM that is does on players in normal game modes.
As Dycker mentioned, it messes up the aim of bots/snipers.
edit: i didnt find any document on the internet, that writes it would be different in the other (normal) game mode. Now i am 100% sure.