Animation glitches in different project

I opened a Unity project (HeartAR) with the following correct animation:

When I export the prefab (including dependencies) of this heart and import it into another project, the animation suddenly looks incorrect:

I also observed the same glitch with the animation when downloading the Asset Animated Lungs Pro Textured from the asset store. What could be the reason for these glitches? Animated Lungs Pro Textured | 3D Characters | Unity Asset Store

Found out that it has to do with MRTK. I imported the beating heart model in an empty project and it looked fine. Then once I added MRTK to the scene, the model got screwed up.

It was the Quality setting at very low. Changing it to high solved the problem.