The issue is that the point of the hips is locked in the same location over the animation sequence. This makes every animation work incorrectly. I am experiencing the same thing using Mixamo animations put into Blender and then exported out. The animation works fine except that the hips are locked in space.
Here’s what it looks like in Blender
Gyazo
Here’s what it looks like in Studio
Gyazo
So how can you unlock the hip so it moves freely?