Import FBX with animations inconsistency

When I import a humanoid asset with only a T-pose into Unity everything orients as expected.



When I add an idle animation (after the T-pose) and import into Unity and the arms are twisted 180 degrees for some reason. This also ruins the idle animation. How does Unity go about normalizing orientations with it comes to importing animations? Is there a way to force Unity to adhere to the T-pose orientation.



These files are generated from Houdini and load correctly in Houdini.
Viewing the asset with the idle animation in other viewers renders the T-pose correctly as well. This seems to be an issue related to Unity importing.

 

Actually looking at the screenshots above it seems everything under the neck is turned 180 degrees... Has anyone experienced this before?

 

Also the mesh imports properly so it has to how the idle animation is read that is throwing everything off...