I got this bug too on the level after this, and I think I know what causes it maybe? In the level this person is showing, I managed to exit the level before dad did. Then in the level right after, it only let me complete that level when I completed it before dad again.
To complete the levels before dad, I used a glitch where if you have a reprogrammed/possessed robot's code open when the level ends, it gets permanently reprogrammed with what your code page 0 was when the level ended with its code open.
Hope that helps!