Export Mixamo Rigged Model to unity have rotation issues

Question

Im trying to export correctly some rigged models from Blender to Unity, but im facing rotation issues, that cause bones are not correctly set.

First I download the *.fbx from Mixamo, then import into Blender setting "Force Connect Childrens" and "Automatic Bone Orientation", this import the model with the bones correctly.

Now I add some clothes to the model, and add bones and bones, then I add vertex groups following this howto: How to rig clothes?

Now I have correct model with the correct cloth.

The I export to FBX, using default properties (I tink I try all options here) then in Unity I drag and drop the FBX to the resources folder, and then drag and drop the model in the scene.

When I do this, using the original Mixamo fbx file, the model animate correctly, and works, but when I do this with the generated fbx from blender, the model appear deformed when I run some animations, and the cloth same, like the model "xplode" and the poligons go mad.

What I notice, is the Skinned Mesh renderere in Unity, have incorrect rotattion like show this image:

I search the origin of the rotation because the transform of the element is set correctly to 0,0,0, and I found that the rotated object is the root bone of the Mesh renderer, is rotates like -158º

I try to fix manually but this rotate the model, and all animations deform completly the model. I think all bones ans skinned mesh render have incorrect rotations, but I dont find how to fix, because in blender all appear correctly, but when I import into Unity are broken.

some idea? thanks.