Hello,
Not sure if this issue was already reported but there is a little display problem with the Warhorse tabard.
If worn with a chest plate for example, belts simply disappear.
See example bellow:
I hope it will help 
Note, with a brigandine the result is in between, the belt are partially displayed…
Seems to be better since the patch 1.4.
But Belts are globally missing on all tabards when worn over a chest plate still