I suggest taking a look at the screenshots first, since they provide the most info for this bug.
I checked all my graphics both ingame and in studio, and I put both to the max setting and this bug still occurs.
For some reason, in Edit mode, the Universal surface appears on bricks that have a material other than Plastic (specifically Slate and Cobblestone in this case, I haven’t tested other materials), but once I click Play/Play Here (go ingame) the Universal surface disappears on the Slate and Cobblestone bricks, but remains on the Plastic brick.
Again, I’ve already tried editing my graphics in both Studio and ingame, and I’ve restarted/reinstalled Roblox Studio a couple times as well.
Here’s a view from Edit mode:
Here’s a view from ingame of the Slate and Cobblestone bricks:
And here’s the view from ingame of all of the bricks (Plastic, Slate, and Cobblestone; all of which have the Universal surface on all faces):