c# - WinForms application DPI-awareness only working at 125% scale

Question

I'm making a DPI-aware WinForms application in .NET Framework 4.8 using VS 2019. My monitor's scale is set to 125%.

I have added

<System.Windows.Forms.ApplicationConfigurationSection>
    <add key="DpiAwareness" value="PerMonitorV2" />
</System.Windows.Forms.ApplicationConfigurationSection>

to my App.config and have uncommented the appropriate Windows versions in my app.manifest. I have not edited anything besides that.

Now, when I build the project, I can run the app fine and it looks as expected. When I send it to a user to test however, the app is blurry and misaligned. Their display scale is set to 100%. I have confirmed with them that setting their scale to 125% fixes the app so it displays perfectly again. Anything higher than 125% and it will look bad again.

What is the issue here?

Answer 1

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