This isnt actually a bug. Its meant to stop you from spamming airblocks so you cant cheese levels and just airblock all the way to the finish. But the feature does feel pretty buggy ngl
Good to know this isnt actually a bug. May want to fix the issue of it stopping you from normally scaling cubes after the fact. Ive had times where i will spam air cubes for a bit, then i wont be able to scale my cubes for the rest of a run.