I don’t know why, but on a WSA Build, ARM, with Supported Orientations (Landscape and Landscape-Flipped) my game is starting with a strange resolotuion 720x1280 (Portrait) instead of the 1280x720 (Landscape).
It was working until some time ago, but now it only starts with this resolution! Is there anything I can check to solve this?
That is because you scripts are executed after the splash. Try forcing orientation using WinRT API in App.xaml.cs file, preferably before AppCallbacks is created.