Characters with another character set as a child of the left hand will break FK when the parent character is replaced.
Steps to reproduce:
Enable FK for character 1
Set character 2 as child of character 1's left hand
Replace character 1
This causes the right arm FK to reset to the animation default and modifying any FK nodes on the right arm affects character 2 instead of character 1. Attached is a scene with this set up, replace the male character to see the bug in action.
Tested on Koikatsu with no plugins installed so it appears to be a vanilla game bug
Characters with another character set as a child of the left hand will break FK when the parent character is replaced.
Steps to reproduce:
This causes the right arm FK to reset to the animation default and modifying any FK nodes on the right arm affects character 2 instead of character 1. Attached is a scene with this set up, replace the male character to see the bug in action.
Tested on Koikatsu with no plugins installed so it appears to be a vanilla game bug