Yosemite - EQ ISSUE

Hello, I’ve updated my OS X from 10.9 to 10.10.5 and I’ve noticed a problem with the EQ.
Any idea about it?.
You’ll find a really slow response when I move the pan, the LC, is like a graphic issue.
There is only 1 audio track with no inserts at all.

Any idea?

I’m using a 3840 x 2160 (30hz) TV GTX 980, and Only Nuendo seems to have this kind of problems

VIDEO
https://www.dropbox.com/s/mni6s780pcumke5/NUENDO%207%20EQ%20BUG.MOV?dl=0

I believe now that it’s a 4k issue, associated with the hz, I can’t get 4k at 60hz, only 30, and this seems to be the problem.