Question Animated mirrored object exporting problem.

I have made a small 3D animation in blender, i exported it to unity and it was mostly intact, but the mirrored objects were exported badly.

it looks like their rotation is relative to one another, but it doesnt happent in the blender editor.

edit: I checked, and when i remove the mirror editor's "Mirror object" it matches the animation in the unity editor, Is there a way to make sure that it keeps the "Mirror object" in unity too?

any ideas whats going on?
unity editor:

Blender editor:

Ignore the colors, thats a problem i know how to fix.
Thanks!