Hey; I’ve been writing a fic that’s just that if you want to read it xD
Tfa and tfp bumblebee get swapped around and have to deal with all of that
https://archiveofourown.org/works/63852529/chapters/163746325
Body swapping but it's the same character across different continuities.
G1 Decepticons and Autobots having to deal with Bayveres Optimus
TFOne Bumblebee freaking out because he's not able to talk
IDW Prowl ending up in the Animated verse and What the actual frag why are the Decepticons so big!? Why am I so small?
None of the other characters would know what had happened unless they told them (well some might be able to figure it out, or at least can tell something's off). So to them whoever got swaped is just having a mental breakdown.