DisableAltEnter

Alt-Enter is used by Midnight Commander, and by default Windows Terminal maps this to toggle fullscreen (which is also done via F11). To remove the mapping for Alt-Enter, add the following to your keybindings:

{ 
    "keys": "alt+enter", 
    "id": null
}

that is, put it in the "keybindings" array thus:

{    
    "keybindings": 
    [
        ...
        {
            "id": null,
            "keys": "alt+enter"
        }
        ...
    ],