Glitchy Lip Animations

This is so weird. I’ve only started having this bug recently. ?(
The lips of scientists do not animate properly. I’ve tried verifying the cache and redownloading the game.

This happens with all human NPCs, game-wide.

Here’s the screenshot: https://steamcommunity.com/sharedfiles/filedetails/?id=521449443

Half an hour ago, the guard decked him something good.

Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.