I've been seeing a very similar thing today on a newly-published survey that's undergoing testing. I've been using this device (Android) for testing a variety of similar surveys over the last four months and today is the first time I've seen anything like this. It impacts some photo questions but not others (tested each question repeatedly), haven't been able to figure out why yet.
Edit: Since bringing my phone back from the field, charging and rebooting it, I haven't been able to reproduce this.