Lagging waveform when editing in zoom

Hi, i can’t edit/move audio without it lagging when zoomed in on a waveform. Is this a known issue? Same graphics card and never experienced this on any other version of cubase. This was a fresh install from 8.5 to 9.5.
Please see video when i zoom in, what im talking about starts at 20s. Happens in all old projects and new empty ones.

https://www.youtube.com/watch?v=BcN7tuBJQyY&feature=youtu.be

Anyone from Steinberg care to comment?