Cannot fix Windows 10 resolution to a chosen value (Parallels 13)

Hi!
I run Windows 10 through Parallels 13 on Mac, and need to set the resolution to 1920x1080 (scaling 100%), in order to fix a problem with a Windows-based program. I managed to set the scaling to 100% through some configuration tips here, but the resolution keeps changing as soon as I resize the Windows window. I understand this is the way it's supported to work but is there any way to fix the resolution at 1920x1080? I usually only work in Coherence mode.

Would be immensely grateful for help!!

 

@StinaD, did you try these steps?
It works for the full screen mode, but if you didn't try this, please apply the same for the Coherence mode
and provide us with any results.

 

Yes this solved the problem, thanks!