Opening up this survey on a native device using the built-in web browser control causes the location question to not open. If we open the same survey in the device's browser app, the location question opens. This survey was designed and published in S123 Web. As a test, I tweeted this link, and tried to open it on my iPhone in Twitter and was able to reproduce the issue.
As we discussed on the phone, I can reproduce the failure for map loading in an WebView (brewer embedded in an app). Could I ask you to file a Support BUG to be able to track this issue?