Unfixable display scaling when Mirroring “unsupported” Displays

[Cjnator38]

What Happened

When I tried turning on the Mirror Display option for my TV, UI scale would increase by a lot. I would've turned off the option but I can't access the toggle since it's at the bottom of the window. My TV starts showing the "Unsupported Video Signal" screen with Night Light on and off, even though it works fine without Mirroring.

Expected Behavior

When turning on the option, the displays would blink, and the external display would be affected while the main display stays the same.

Steps to Reproduce (based off of complete assumption)

1. Open Display Settings
2. Connect a HiDPI display alongside a LoDPI display
3. Turn on Mirror Display

Logs

Unavailable

Platform Information

elementary OS 5.1.7 (Mostly up to date Switchboard)
Kernel 5.4.0-54-generic
Intel Core i3-3217U/Intel HD Graphics 4000
4 GB RAM
490.7 GB/500 GB HDD

Hoping this gets fixed in eOS 6!

[ChildishGiant]

For me it's resolvable by switching to 2x DPI (the one it swapped to) to update the ui and then back to 1x again

[davidak]

This is still an issue with switchboard-with-plugs-6.0.2!