Parallels Desktop 13 upgrade issues

Hi, I haven't receive any answer since October the 13th. Display artifacts are becoming really annoying, and none of the updates you released seem to solve it.
How is this possible?, it's been months since version 13 was released, apparently, too early, as this flaws are common in a beta stage, not a final version.

 

I just saw your last video with vertical artifacts when switching desktop spaces in full-Screen mode... so annoying...

 

Please take a screenshot of it and reply with the same. Thanks!

 

I am sorry, a screenshot of what? If you want a screenshot of the artifacts, I attached one to a previous post.