Deformed rig on version change

Questions & Answers
1

Switching from Unity 2019.2.12 to 2019.3.13, for xr interaction toolkit. Everything works fine except for rig for my character which looks like this:

159889-screenshot-8.jpg
159889-screenshot-8.jpg1018×761 178 KB

But it’s supposed to look like this:
159888-good-rig.jpg
159888-good-rig.jpg1562×1078 367 KB

As you can see it uses Biped IK, I’ve tried to redo the whole prefab by applying all the components and settins from scratch, but my only result is that it look ok in editor but behaves like picture one as soon as I hit play. Which can give us some hint.

Hierarchy of this character is pretty simple, it uses mixamo rig, parts of the body are child of root obj with animator, rig is right below. Worth noticing is that It’s a blender model.

2

Solution is here:

I redid the prefab so i took the model, put it to scene and applied Biped Ik and all that stuff from previous prefab
But still after hitting play it was deformed
I noticed that under export options under rig there was a mis match error
This document helped me:

But at the end before step 1 and 2, I did also reset the pose and only then enforced T-pose and now everything works