i have a Video to show the Bug, but let me try to explain in words. I have a Mesh with Bones and an animation. When i click on Export AND then click on "Scene Export (3 Files)" the animation will be screwed up. Looking into the Mesh (case.smd) i noticed the bones had wrong rotations. When click Export and only Export the Mesh by clicking in this case "case.smd" (Badumm TSSS) the bone rotation will be correct.

Here is the Videolink:
https://drive.google.com/file/d/17L7qJ-UUsncT4RcMeFlHlT3QS14gg8gJ/view?usp=sharing