Re: iOs is not receiving SDL_WINDOWEVENT after screen rotation.
Are you adding SDL_WINDOW_RESIZABLE to your window flags when you create the window? Have you selected all the desired Device Orientations in Xcode's General tab or info.plist? I believe these need to be done to get SDL_WINDOWEVENT_RESIZED events.
I think that warning log is more of a problem on Apple's end.