Different simulate physics results when setting scale by hand vs by script

I’m having issues with enabling phyiscs on a skeletal mesh with a changed scale

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there are 2 scenarios - one where i set the scale from the script (left)

and one where my mesh is placed into the level and I manually set the scale in a blueprint (right)

after calling set all bodies simulate physics, the one on the left goes nuts while the one on the right is fine

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what is the difference between manually setting the scale and setting it from script?