While watching Ryemanni play through LP3D in Loap, he ran into a case where in an enclosed level he moved a camera into a tunnel created by a basher, then rewound gameplay. The result was that this camera was stuck in the tunnel, which caused issues that I can't go into detail without spoiling the level.
Loap does have a means of moving the camera through walls, but this may feel a bit cheaty for some players. A way to reset the cameras to their original positions seems worthwhile.
Important context: Much like how NL doesn't treat the scrolling as part of the replay, Loap doesn't treat camera movements as part of it, so rewinding does not undo camera movement.