I have an iphone and on the most recent iOS: 11.2. The map feature in the RE mobile app has never worked for me. I have the most recent version of the RE mobile app installed. When I click on a constituent's address the map should open in any app (Google maps, etc.). I have Google maps installed and nothing happens when I click on a constituent's address. If I uninstall Google maps, the map opens in my default browser.
We are currently evaluating this issue and will update this article when we have more information.