My deliveries don't refresh in the background. Also, they don't refresh when I pull down or tap the refresh icon on the main list screen. The progress icon shows as if it's refreshing but the info for the deliveries doesn't change.
However, if I go in to a particular delivery and tap refresh icon there then it refreshes.
I had three deliveries entered a few days ago with notifications set to one hour. I went in today and it said no data. I pulled to refresh and nothing changed. I went to a particular delivery and trapped on show on browser and the purolator site showed three updates from yesterday. I went back into deliveries and trapped refresh from main list, still no data. I went in to the particular delivery and trapped refresh there and all three updates appeared.