Weird deformations on face in Unity after exporting from Blender.

I’ve got a character setup with Rigify in Blender.
Retargeted an animation from Mixamo on to my Blender rig.
In Blender everything looks fine so far.

Imported the character in my Unity scene, but while playing the animation certain parts of my body get deformed in a weird way.
There’s some sort of tearing/squash/stretch happening but I’m not sure why.
Does someone have any idea why this is happening?

Blender GIF (correct):

Unity GIF (look at the mouth area): https://i.gyazo.com/8a611b44f8e1816e9f29522dee19ffc9.mp4

Imgur: The magic of the Internet In the screenshot you can see the face of the character before the animation starts playing and during.

Found the fix from someone on Reddit, turned out my skin weights quality was set to low.

Go to Project Settings/Quality/Meshes/Skin Weights - Increase that value.