While soloing Uldir, I died to one of the auto-kill mechanics at the same time as killing the boss “Zek’voz”.
When I released, I showed up as a ghost within the instance, but it would teleport me back to the spawn point after about 5 seconds so I couldn’t run to go back to my body. There was also no spirit healer present.
Logging out and logging back in fixed it, causing my character to rez.