Start by updating your graphics driver and checking the relevant hardware acceleration settings in PS and ACR.
This is the third post reporting the same problem. we need to know your system spec to see if there is correlation between peple having this issue.
That works. Disabled graphics processor and that fixed the problem
Not sure why this is an issue now. Graphics driver is updated and have been using updated versions of Photoshop with same system for 2+ yrs. Never had this problem before.
GeForce GTX 970 graphics card