It is as the title says, it’s possible to get yourself stuck and unable to move on a certain hill in the ritual lake map. I discovered this because i spawned in the middle of this hill and couldn’t move. You can use a movement skill to get unstuck but can also use a movement skill to get yourself stuck again.
This is shown in this video.
I do not have the player logs for this but i suspect it shouldn’t be too hard to recreate.