Hey there!
As you know, avatars shake/knockback their head on hit.
When testing VSFAvatars, if I send any tracking data from VSeeFace, the shake for that avatar will stop. And it will remain this way even if I stop sending any data. I would need to disable VseeFace and reopen VTuber Plus to be able to see the shaking again.
I checked and this doesn't happen with VRM avatars.
Is this a known issue?
I tested various VSFAvatars and they all behave in the same way.