There appears to be a problem with some Witch Doctor cosmetics glitching together, especially combined with the item "Covers of the Foreteller's Oath".

Another glitch appears with his face in the ingame portrait: when the character talks, his mouth does not really open (think this is specific for the "Hat of the Foreteller's Oath")

I hope the glitches are visible in this imgur page.
https://imgur.com/a/ZI0iaCb