Hello Laurie,
Sorry to hear that you ran into this issue. I opened a support case on your behalf so our support engineers can check what's causing the pixelation issue.
While waiting for someone to reach out, please check if both monitors have their scale values set to as close to 100% as possible. To check, right-click anywhere on your desktop, click Display settings, and then adjust the Scale value of your monitors to 100%.
You're in good hands, and if adjusting the scale value doesn't work, a support engineer will be reaching out to continue troubleshooting the behavior with you.