Sorry, reading your reply I realized that I didn't explain my setup at all. My ultrawide is a 5120x1440 display, which I assume is the reason for the taskbar interaction and would explain why the mismatched resolution works.

On the other hand I seem to have found a working solution:

The application, which surprisingly works on windows 11, adds a hotkey that disables the the taskbar from popping up. I assume it removes the single pixel that the hidden taskbar occupies but I am no software engineer nor do I understand the program itself.

as per the title, setting a resolution for a window on my ultrawide will still interact with the taskbar when its in auto hide. This causes a single pixel overlap that pops up the taskbar whenever the mouse goes to low.

One fix for this would be to use translucentTB, however it is currently broken with new versions of windows 11. Another option, and one that I'm currently relying on, is to set it to 2560x1439 rather than 2560x1440. This works fine and there's no real problems I've seen with the odd aspect ratio however it is a bit hacky.

One other solution is to move the position of the taskbar, however the option has disappeared in windows 11 and, again, on newer versions of windows the reg-edit method is gone.

Just wondering if there's another way people have gotten around this issue or if I'm just stupid of something.

config.ini