Thank you! Are you using the default FBX files, or did you export the animations from the Blender files? The animations you mentioned have a left hand IK constraint, but it seems the IK didn't export correctly.
Then it looks like I need to re-export and re-upload them correctly. Thank you for pointing this out, and sorry for the inconvenience. In the meantime, you can open the Blender files and export the animations yourself