I had this issue playing co-op where my friend got kicked out of the game (due to his internet crashing) while I was reviving him. His body disappeared but I got stuck doing the reviving movement, everything was still happening around me and if I clicked 1-8 it would highlight a different tool but nothing would change. He reloaded into the game and respawn at our base, his backpack spawned in front of me out of nowhere but I still couldn't leave that position. No command would work and I had to force quit the game. Now I have a random backpack showing on my map but nothing is there because I didn't in fact die