Distorted previews and exported images in Lightroom-
On my new MBP 2017 I get strange red square boxes like in te the screenshot below.

And strange preview distortions like the image below.

And some exported images look like this.....

These problems occurred with my new MacBook Pro 2017 which I bought 2 month ago. I got a new one but now I am having the same problems and they are getting worse.
Another strange thing is that when I change from library to develop mode somtimes the Lightroom part of the screen flickers for a couple of seconds.
Please can anybody help me or tell if the have the same problems?
