A long time ago, possibly a year or two, roblox added the new camera to servers. This I believe, made the camera usable to look through parts and objects that had any type of transparency on them, making items clickable if they put their cursor through the part and if the item had a click detector.
I am trying to find a route around this so my players of the game aren’t able to do such anymore.
I believe this belongs in scripting support, but pretty sure you can go to PlayerModule>CameraModule>ZoomController>Popper and on the line 128 there is something about transparency, you could change that to 1 or 0 and see what happens.