Excellent feedback!
Have redone the system somewhat in the next version. Will see if i can replicate the issues in the new system. I believe the issue comes from pregnancy using the same morph as breast size. The pregnant breast value should be saved and set if pregnant but somehow it seems to set the value to 0 if not pregnant.
Interesting that the implant has an impact as well, as it shouldn't have. But it's a complex system and i probably made an error somewhere. Great with some deductive troubleshooting, much appreciated!