Missing melee weapon animation?

[VENDOMINUS]

  Has anyone figured out how to fix the bug where your melee animations go missing and you just your attack while your character model just sits there? This bug has been in the game for a while now, so I was wondering if there is a solution.

While in a mission it sometimes fixes itself out of nowhere and then starts again, again at random. The game is playable, but it makes things like glaives really hard to use, since you can't see yourself throwing the glaive, which mean you'll usually miss the detonation window.

At present it seems to happen with all types of melees so the weapon type doesn't seem to matter.