Gnomish textures/hitbox/lod bug or feature or what do I do ?

I've been playing gnomes for a while and gotta tell you i faced many bugs that they produce, gnome mount bug etc etc

I have this certain bug/feature for the last 2 weeks already.
Short discription:
when landscape changes camera turns onto 1st person view:

https://www.youtube.com/watch?v=8FuokubvyKA

https://www.youtube.com/watch?v=kyroHCpbNUA

It becomes unreal to play on arenas that have upturns/stairs/lifts even the tomb at lordaeron ruins.