I have a strange problem and I do n’t know how to get the Title

[liuleizos]

When I knock down an enemy or I get knocked down by the enemy, as long as the terrain of the battle is on the slope, the character model will be buggy and will appear every time. At this time, both physical and magic weapons can cause damage to the character. The character remains in this state after death, and can only be disabled by entering disable / enable. However, if the battle terrain is flat, there is a certain probability that another situation will occur: the character will use the lying down position, but the character does not actually lie on the ground, but is at a certain distance from the ground and stays in In the air, the character cannot be selected at this time, so that all physical attacks cannot hit the character, but magic can cause damage. When the character dies, this state automatically disappears.
See picture:

[RomeoZero]

Maybe you installed a mod something with a "Ragdoll" in the name ?