Player Character collision with grave/underground enemy

I was trying to plunge attack this enemy as it exposed itself and while very funny for me It doesn’t feel entirely intended? Being able to mount certain enemies like this would be cool honestly in practice but I can tell it’s a bug. My movement was entirely restricted except rotating 360 degrees (which also meant the enemy did too.) Ended up in a feedback loop of it trying to attack me while I was unable to connect attacks or move!