Okay, I'll check that out, but you should first see if, when you go to the bathroom, the dialogue with Mula has changed and if she takes off her towel in the bath. If so, that means the 30 flowers worked. Otherwise, the bug might be caused by the old save file; I'll look into it. Thanks.
If that doesn’t work, I recommend creating a new save file to minimize bugs as much as possible.
Otherwise, wait for the next update.