MacbookPro - resizing window distorts view

I'm evaluating Parallels pro 15 for Mac and everything seems to work fine except when I resize the window the view becomes stretched and distorted. I'm sure it has something to do with how the window is trying to scale the view. This happens for all the VMs.
I've been hunting for a solution for several days and have not found a way to solve this.

Any suggestions would be appreciated. It's the only thing that's holding me back from purchasing a license.

 

I was able to reach support via messenger and they shared this link with me: https://kb.parallels.com/123968
I followed the directions and everything is working correctly now.