There appears to be a similar issue with the Reporter Instant App as well. Pop-ups are disabled in my webmap but still appear when clicked in my Instant App, plus the map zooms to the extent of the feature, rendering it unsuitable for publication if a map includes large layers such as state boundaries. Even in one of example apps provided by ESRI you can see this happen when clicking outside of a rental property: https://arcg.is/1DPfuq