Hey guys, I'm new to the forums here, but I've been an active mapper for some time now. Anyways, when building a test chamber I found this glitch that actually BREAKS my puzzle and ruins the chamber. Here it is:

Stack a reflective cube on another cube. Shoot a laser through the reflective cube. Remove the other cube from under it, and the reflective cube will just float. Any possible solutions or ways to work around this?

This is a known glitch and, to my knowledge, there is no way to work around it.

Maybe you could create a trigger_push with a filter to keep the cube down?
(49.99% chance this will not work at all.)

You could try sending it inputs periodically...something like "enablemotion" or "wake" that could fire when the other cubes detect the player has picked them up.