Dash freezes your facial expression?

[FangelXIII]

Describe the problem. Be as specific as possible!:
Uh...yeah. I look pretty bored.

Images of problem

[Pink Bean]

I walk for a long distance and sometimes my face freezes while blinking, it's happening to a lot of people
it sticks like that until I stop or do something else.

[Kirov]

It just seems to happen randomly. I also noticed you don’t do the F1 face properly now when you take damage. It just changes for half a second and then straight back to your regular face.

[Green4Ever]

Sitting down also freezes your facial expression.

[Dark Link]

Demon Impact freezes my facial expression.