So every time I would import a tunnel system I made into blender, so basically a hallow cylinder, there would be and invisible part in it, now this part spawned randomly every time I imported it, there were some times where I could not go in, some where the floor was a stud off the ground and more where there was an invisible barrier halting my progression to the end of the tunnel. Here is a list of stuff I did:
Remade it
Imported it into a meshpart
Shut off studio and blender and turned it back on
Used a different object like a block instead, or a circle.
If you have any Idea on how to fix it I would really appreciate it.