It's not bugged
Orbs and runes are NOT inside the maze more than 1 per colour
and it's definetly NOT 4 dimensional...
The rooms cen go over/under the existing rooms and there shouldn't be more than 2 layers.
There are also rooms that teleports you into another locatiaon in the maze which is why it's so confusing.
The easy way is to start drawing a map with every blockade (and going over existing rooms) untill you find a colour.
Than start a drawing on a new sheet of paper untill you find another (or the same) colour.
After you fing all the orbs/runes, you have the place mapped an you can start matching the colours. NOT BEFORE You can even make a whole map out of the pieces you found but I couldn't be assed with that so I just made a markers where does the rooms connect (1-1, 2-2 etc...)
Whole thing took me about 3-4 hours (maybe 1-2 hours with the addon, and than I reasiled it won't help me)