[tungki]

sometimes when people use jetpack, you can't see their jetpack and it is look like the player using air break..


you have to teleport somewhere else then teleport back again to player location to sync their jetpack

[NaS]

Yep. It's happening if the remote player didn't touch any ground before entering the Jetpack (on your screen, not his).
But this is easy to detect server-side (since the special action is still set to Jetpack).