Ive got the same issue, however my situation is that whenever i am in stealth or after i break stealth i get silenced for 2 seconds every now and then.
Proof: https://imgur.com/a/CgzvUdJ
WoW Freakz link: https://www.wow-freakz.com/achievements.php?achievement=10672&name=broken-isles-diplomat
Bug description: Ive gotten revered with all of the factions in the broken isles, however it does not say that i have completed this achievement beca ...
If it makes it any easier to fix it with more proof then here is another picture where i opened my weekly chest and didnt recieve Writhing essence or any gear.
Proof : https://prnt.sc/m2y8p0
Topic: 
World of Warcraft
