this worked, thank you
I also had to UNSET all the flags in the Root Motion panel for the SOURCE animation
Set Retarget Root to pelvis for TARGET animation in the IK Rig
Interestingly, it doesn’t seem like the root motion is baked into the re-targeted animation, as changing the flags there causes the animation to be in-place.
@TheWolf
Initially, my retargeted animations looked kind of like your first picture, except the IK bones AND root didn’t move. I am using virtual bones for IK (we’ll see how long that works for). Now they all move with the animation, not perfectly though.