I get a crash when giving a pregnant slave a miscarriage potion, selling them or setting them free. I don't think this is the old pregnancy resets bug.
Viewing post in Aric's Expansion Rebred
The slave guild abortion and miscarriage potion both use the abortion function. Any attempt at removing a pregnant slave from the mansion results in them using the abortion function. Thus all 3 cases call the same function that was the cause of the old pregnancy resets bug, which in Strive v1.0d results in crashing as the game is no longer running in debug mode. So unless you have already implemented the fix yourself, this is the cause: https://itch.io/post/2931544 The Bugfix mod attempts to clean up loose ends by not keeping unnecessary data, which in this case is babies that will never be born.
Edit: just woke up and overlooked a call of abortion function
The strap-on size is an oversight in the vanilla sex descriptions. It is trying to produce a description of the penis, for which the strap-on acts as a substitute in most conditions requiring a penis. However, the text description function for penis size does not allocate a size for the strap-on (because it has none), so it simply uses the smallest description.
The text function can be easily altered to either produce no text or the largest size. Choosing an custom size of strap-on would likely require and re-working of the concept and a separate action per size. Also, Aric's mod adds functional stuff like stretching, which will also have a size problem with strap-ons. Though this slightly less tricky to resolve, there are 8 instances that need to be changed.