Same is happening with mine, even characters change their position to"default" during cinematics. I called tech support and they told me it was possible a problem with the hard drive. I delete a lot of stuff I had in hdd and restore system file but the problem is still there.
I am calling again.
It's most likely a faulty disc, the only times mine has messed up was when Joel was pushing an invisible cart, sound gets muted for a second, or sometimes the enemies teleport when I choke them out.