indeed, that's strange because we don't have this behavior on Linux.
I guess that the input box don't accept the key events the same way it does on linux, maybe linux accept the backspace on key press and windows only on the key release, as we handle the backspace globably on the key pressed this might cause this issue
I've noticed that backspace will go back to the previous screen like the back button does. This might be what's causing it since its previous state was minimised.