no automatic upload for fenix 5 on iOS?

I noticed I had to always turn on Garmin Connect app or at least have it on the background in order to upload the data to my phone. This wasn't the case for other watches. I searched online and there is actually an 'auto upload' enable/disable button in Garmin Connect for Fenix 3HR but that's not the case for Fenix 5. Is there any way to get it automatic upload when I save on my watch? Having to turn on the app every time I save a run is annoying.