Since the server transfers from Pryewood to Hoptallus, my Night Elf Druid’s character model is bugged.
Half of the body appears naked, showing a six-pack. Even when I equip a guild tabard, it doesn’t cover it, which is quite annoying.
For reference, I’m using the Druid Challenge Mode gear as my transmog. Please look into this issue. I’d attach a screenshot, but I can’t find an option to upload one.
that is very funny visual bug 
try full cache delete, here is guide:
Tired all that, doesnt work but I have found what is causing the bug.
Its the Tmog of the “Waistguard of the Cycle” if I take my Tmogged belt off, my six pack disapears so for now, I will remove the Tmog on my belt, which is s shame as its part of my Challenge mode set but I doubt Blizzard will ever fix it.
do you have same issue with [Cord of the Dreamgrove] ? that is a recolor of that item
https://www.wowhead.com/item=139729/cord-of-the-dreamgrove