Ward Invincibility - Orian's Sun Seal?

Character - 98 Void Knight Drewbtw (Offline)

Three times tonight I’ve noticed my character randomly stops taking any form of damage. You can see the damage numbers there, but no damage happens. You can see my ward bar is full for some reason even though I don’t actually have any ward at the time.

I’m playing a void knight where my only access to ward comes from symbols of hope. My best guess is that it’s some weird bug with the Orian’s Sun Seal ring but I haven’t caught the exact moment the bug happens. So I don’t really know what causes it.

I’ve attached a video of the invincibility, and I’ve also attached an image. The image shows this weird black circle under my character that happens whenever I’m in the invincible state. I’ve also attached my logs.

Weird circle - https://imgur.com/a/ciacnMK

I uploaded a short youtube video showing the invincibility.

Let me know if I can supply anything else to help.