Weird issue with a car

my game uses these car models published by roblox, primarily this one

the only differences between our model and this model are cosmetic or don’t really interact with the rest of the car, and the bug happens with the fresh version of the model

for some reason, upon the car falling into the void, anybody who is in the passenger seat cant jump or use proximity prompts upon respawning, weirdly enough the driver isn’t affected by this.
resetting does nothing and the only way to revert it is to fully rejoin the game
me and the other dev have looked for this bug for hours, but cant find anything