I stumbled on related problem, I think.
- Downloaded Mixamo character and manually added a root bone in blender. Then imported it to unreal. Character oriented properly - everything is good so far https://i.vgy.me/T2Ug1C.png
- Retargeted a climbing animation from UE Mannequin. When Root motion turned off - everything is perfect. My character moving up as intended https://i.vgy.me/Fh1DkS.png
- But when I turn root motion on - Z movement flips and a character starting to move down https://i.vgy.me/E6LFni.png
In blender I turned Root bone like this https://i.vgy.me/k53E0h.png (Z pointing down). This way it imports to unreal with proper rotations as shown abowe. And I am sure, this is the root of my problem But I can’t figure out how to set this up properly