I downloaded the animation from Mixamo, passing it through the blender, then it gets distorted (I didn’t touch the animation. Just clicked “import” after “export”). That is, as I understand it, the animation is affected by some parameter when exporting from the blender. Below are the screenshots.
This is how the Mixamo animation imported into Blender looks like
And this is what the Mixamo animation looks like, imported into Blender, and then exported to fbx and then imported into Unreal. I repeat, I didn’t touch anything except the export settings.
And this is an animation from Mixamo, which I did not pass through Blender