Retargeting and IK problems

Hi, Im having problems with Foot IK. ALready tried retargeting with many ways, but the problem its always the same. The animation on Montage work just fine, as you can see on first video. But When I hit play and test in-game the foot IK breaks the leg and cant “slide” to back of the character. I’m pulling my hairs entire day trying to solve…


Oh, I found the problem. The Default Slot must go AFTER the Control Rig and not before. I don’t know why the DefaultSlot is before, and if it interferes with something else, but that’s what fixed it for me!