Not sure what category this lies in, but in studio, my games run perfectly fine, however in an actual server, theres a strange glitch where when the player jumps, they fling off in a random direction.
Very similar to what old buggy vehicles used to do.
Here is a clip of this glitch occurring:
Did you check the Developer Console in game to see if there perhaps any Errors or Warnings? Also by the way, the post should probably be put in Scripting Support but that’s just my opinion.
This isn’t a building issue, but I do believe it has something to do with one of the scripts used. It could be a collision issue or even a camera issue.