Guar follows actors too closely
In OpenMW guars will actually collide with the player or with NPCs they follow such as Llovyn Andus near Pelagiad, leading to awkward jumping about. In Morrowind they stop a few paces away and do not collide.
OpenMW: https://streamable.com/mohjph
Morrowind: https://streamable.com/bhfsqw, https://streamable.com/hbdaai