1) You need to post a console log.
2) Your videos don't actually show anything because you're in third-person mode.
Look when I get out of the vehicle, my hands are missing, nothing wrong is wrong with the vehicles, they act as they should, but getting out causes the hand nodes to be hidden with vehicles that move the hands to be placed on the steering wheel. I'm not sure what you mean when you say I need to be in first person because what view i'm in is irrelevant to the problem, the video shows the issue, I had hands when I got in, I didn't when I got out when I was in a slayer minigame.
The issue doesn't exist outside of slayer which leads me to believe that this issue is within it
I attached a console.log with trace enabled, it didn't really show anything and I can't replicate the issue on a private server which also raises the point that it might be an addon