Inconsistent retargeting after initial bake

[yohjimane]

Hello! Just want to start by saying thank you for providing this addon! :)

I am noticing some issues while using this plugin, which only happen after the initial bake

In this first image, I have the animation set to a default idle pose. You can see the target mesh (textured) and the source mesh (untextured) - the alignment of the arm is pretty good.

However, after baking an different animation, re-enabling bone drivers, and selecting the same idle pose as the previous image, the arm alignment is now incorrect

I noticed this after working on some script extensions to batch import all motions from a target armature, but the result is the exact same if I do it all manually. Some animations seem to skew subsequent retargeting more than other animations.