Cylinder Variance

I know this is probably a trivial issue, but I have tried multiple ways to solve it and it is driving me crazy. I have two cylinders in a scene which was created in Blender and imported via FBX to Unity. For some reason one or both cylinders renders as a part-cylinder in Unity. It's not entirely predictable, in some cases it looks like a half-cylinder that moves as the view moves, in other cases it looks mostly like a cylinder except that the round internal circle is visible. I've tried changing to extruded circles instead of cylinders and have also tried avoiding cutting through the other surfaces (the floor). Image below and any help is appreciated! It is the rust and blue cylinders I am referring to.