That shouldn’t be the case. How many days has it been, what is the age of the Slave and height, and what size is it stretched to? There is a small chance of regaining tightness each night (to a minimum of Average) based on those factors.
In the bug report (secondary black box), are you getting any errors show at the end of the day? That is when it should clear so maybe it’s being blocked from clearing that.
Edit: As it stands the Anus won’t resize smaller and the vagina will have a very small chance based on them being teenaged, but the height won’t encourage resizing. A Minorus Concoctus should work for it though
