This has happened to me a few times on Official PvE #1502 as well, including just yesterday when a croc I didn’t see knocked me down. I’ve also had it occur when I get attacked while standing amidst my herd of rocknoses; when they all stampede to crush my assailant, I get pushed into this weird ghostly mode.
Typcially what I do to fix it is either logout/in or stash everything in a chest and remove my bracelet.
The weird thing about it is, it’s not simply a case of my character turning invisible, but the camera feels like it is pulled much further back based upon how wide the camera swings. I say this because when it happened yesterday and I had to scale a wall back into my base, the field of view made me think I was still a good 10-feet away from the wall even though my character was able to attach and climb.
If I think of it, I’ll try to see if I can record a video and reproduce the issue…