when making the character move, platforms near the edge of screen disappear and reappear when character approaches them. The camera is following the character and clipping plane is far bigger than the scene. I have tried clipping planes ‘far’ as high as 20000, still nothing changed. This problem started happening after I changed the sprite.
Check these objects’ Z position and try align it with the rest of the game. They are most likely are very close to either near or far clip plane of your camera.