This is technically the opposite of a "bug". In the beta branch, one of Spekio's old levels (pxtxktr) was "fixed".

• After a patch, the level began triggering the fail state as soon as it starts, making it unplayable. This could only be mitigated by pressing printscreen to lag the game. Hence the level was delisted.
• In the beta branch this no longer happening, the level works fine again.

I already suspected the breakage was caused by a change in processing order, and this might be a consequence of the order changing again.