Unnatural FPS drop just in one place

i got almost 60FPS when standing at the same positon, how is it if disable some client mods ?

UPDATE:

In deed might be some mods, I disabled them all and i had no longer lag in that position, I reanabled all I had and problem is still not appearing, might have been that some mod needed to be restarted or something i guess. Also changed Lag comp. to Predictive and back to None. Seems to be working all fine now. 

 

Here is video demonstrating my side. I even disabled almost all the mods I had as extras. Problem still persists. You can see, in top right corner, my FPS dropping from 60 down to 40 in center of my chest zone. Once i move away, it goes back to 60. At 40FPS i can feel the different, characters moves in weird way. 

 

Edited March 25 by allmeitysk