It seems I'm facing the same problem and need help with this as well. I've been dealing with the display issue for months and have contacted the support team multiple times, but I only receive automated responses with no human interaction afterward. The automated response always includes the same troubleshooting steps, which never work for us. Therefore, I was hoping to find a solution here. Here are the details:
Updated OS and Evernote to the latest version
The problem still exists, see the screenshot
I realized, that when I view Evernote in its original size (View->Original Size) the problem does not exist, when zooming out (View -> reduce size) it appears
The more zoomed out, the bigger the white column
Please help with a customized solution
Edit: I removed the screenshots. Maybe due to the screenshots, my post hasn't been approved yet.