[782OB278]

Essentially since the app doesn't have a ventilated seats option to turn them on or off, when you remote start with the app, the seats are turned off automatically.
It may be that the app sends a signal to the car to turn on certain functions and anything else it doesn't control is automatically turned off. Hence why the seats don't stay on with the app.
Could also be a fail safe so the app doesn't cause a glitch and turn on the ventilated seats with every remote start. Especially if the driver doesn't want them on.