I'm in my corporeal form but the server / game thinks I'm in the ethereal form, I can't pass through walls, gain a new body, and curing myself and turning myself back into a remnant does not fix this bug unless I restart the server whilst I'm still within it. I have the pandemonium mod installed alongside the base requiem

This is the exact same thing I'm dealing with, its getting annoying because I just want to possess mobs and stuff and then go back to having a player body. It's super bad when facing a zombie, skeleton, etc, because it tries to make you possess it, but it just screws up my screen entirely as it tries and fails.
Edit: Forgot to mention I now can fly in survival because of this.