[DuckStation] Thin white border all around the screen

When running games in borderless fullscreen on DuckStation, I get a thin white border all around the screen if I do any of the following:

• Select a renderer mode without true full screen exclusive (FSE), like Direct3D 12 and Vulkan, regardless of any other Display Options;
• Select Direct3D 11 with the Exclusive Fullscreen setting under Display Options set to Borderless Fulscreen.

The only way around the issue is selecting Direct3D 11 and a proper full screen resolution and refresh rate in that same drop-down menu (in my case: 3840 x 2160 @ 143.988 hz).

This is not ideal because it makes alt-tabbing and configuring shaders much more annoying.

Any ideas on how to avoid this?