Invalid for some app

Thanks for developing this!
I am using Resset16 with my ipad, ios 15.5. I found the change of the resolution is invalid for some app, such as Moonlight. I connect the ipad (4:3) to an external monitor (16:9). The homepage could full fill the screen while the interface of Moonlight cannot. It return to 4:3 with black area besides. Could you plz solve this? 