Sure, but that's intentional and incredibly obvious in the status bar. It tracks your location between when you place an order and when you're close to the restaurant so that you can confirm for them to start the order.
It's not like it keeps tracking you for hours or days afterwards or anything. Same as Uber -- it turns off after your ride is done. The status bar message disappears.
Point is, the app doesn't seem designed to harvest location data. If you pick up an order at the restaurant, they know you were there anyways. Your phone isn't telling them something they don't already know.