Help my bus glitchs out

Well I made a bus with suspension and when I try to drive it it glitchs out of the map and I need to know why that happens.

If you know why it happens please tell me why.

Please include a video of it actually bugging out.

https://youtu.be/aTtd9X58LcM here is a vid i just uploaded

I really don’t want to download a video can you instead upload it?

https://youtu.be/aTtd9X58LcM here

Are you Unanchoring the parts, or scripting the suspension to change some value suddenly?
Here’s a pretty good tutorial on suspension and steering: