Steps to reproduce

1. Open the Video Settings screen
2. Ensure that your game is in full screen mode
3. Change your fullscreen resolution (video mode).
4. Press Esc (not the Done button) to exit out of the Video Settings screen. The fullscreen resolution will not change.
5. Restart the game
6. The game will start with the changed fullscreen resolution.

Possible solutions

1. Apply the new fullscreen resolution whenever exiting the Video Settings screen, as if the Done button was pressed, to match the internal state of the setting
2. Revert the internal state of the fullscreen resolution when the Video Settings screen is exited without pressing Done (harder to implement internally and inconsistent with the behaviour of other settings on this screen)

A Mixin that implements solution 1 is available at https://github.com/comp500/BorderlessMining/blob/42e31dc847d99a70f3ece692ed5423b065b1e0aa/src/main/java/link/infra/borderlessmining/mixin/VideoModeFixMixin.java.