I was running from a bear when I climbed onto a rock to escape. The bear hit me, and I went down. My NPC companion revived me, but I couldn't move using the WASD keys. I could jump, attack, etc., but I couldn't move using the WASD keys. I used the stuck feature to move me near my current location and then to the closest respawn point, to no avail. Exiting to main menu and relogging fixed it.
The only way I could move was by using control to dash in the direction of the cursor. The rest of the keybinds worked, but the only thing that fixed it was resuming from main menu. This isn't a common bug, not sure what caused this as out of the 20+ times I had been downed before, this only happened once.
Not sure if this is single player only or not, though I haven't encountered this in multiplayer yet