I had a Web AppBuilder for ArcGIS created application that I have been using for months, if not a year, in iOS - Safari. I had features in one of the services set with a Refresh Interval for AVL data. It was working fine until last week. Now, I can only get a refresh when I zoom in. If I return to any previous zoom levels, it shows a cached view - old data. When looking at it from the Web Map interface or in the PC browser, it works just fine.
Something wrong with the new build and iOS/Safari?
I do not have data that is updated on a constant bases to test (my AVL data is not a map service, it is a web service that returns json with lat and lon that I then build graphics from on the client). I would definitely call tech support on this.