I just recently played around with my vanity items and I discovered a visual bug that makes your character almost invisible.
Basically, what you do is you combine the buff from Aqua Jewel with the furbolg costume from Stave of Fur and Claw. It can also be done with the Wisp Form from archaeology, but since that costume only lasts 20s, it's not really that exciting. I've seen another post mention that it works with Shadowform as well, but I haven't confirmed it.
Since this is my first post, my number of links are limited. I'll post some pics in the comment section.
I talked to a few other players and they said that they couldn't see me either, so I'm fairly certain that this visual bug is server-side.
Without any costumes: https://i.imgur.com/sZ0uGIC.jpg
With Aqua Jewel: https://i.imgur.com/sZTke0Y.jpg
With Aqua Jewel and Stave of Fur and Claw: https://i.imgur.com/D1SRIeD.jpg
With Aqua Jewel and Stave of Fur and Claw from another angle: https://i.imgur.com/NxLwNSB.jpg
No need to make 3 separate posts. Merged them together. - GZ