I was advised to make this post by Square's chat support.
Date & Time: February 12, 2019: 12:23pm EST
Frequency: Continuous
World name: Balmung
Class/Level: Level 70 Hydatos gear, all classes
Steps:
1. I have relogged the game several times.
There is no preview image next to the gear's name on the market board, and when I try the gear on, my character's entire torso and arms, minus hands, disappears. This happens for every piece of Hydatos gear, regardless of the class.
I wanted to avoid reinstalling the game if possible, since it runs perfectly fine.