Premier Pro 2018 stopped working with any 4k footage.
Hello
For almost a month I've been working with new 2018 prem and performance has been decent.
But for about a week I started experiencing weird issue with it. As soon as I add any 4k footage to my composition, scale it down 1080p and scrub on timeline, my reference monitor stops displaying, timeline stops working and after that can't render and I ' cant exit prem because it crashes. I've changed rendering mode from CUDA to software, but issues still persist.

Unfortunately I have limited amount I can spend on editing and our IT team have no idea how to fix it. I use 2017 at the moment which works fine.
My machine specs :
GFX : 1080 GTXCPU: i7 7700K
RAM : 32 GB
WINDOWS 10 and prem are installed on ssd.
Thing I've tried to fix it:
- restarting
- shutting down completely
- reinstalling Premiere and media encoder
- cleaning/moving the media cache
- resetting preferences
Any help would be appreciated.
