what's the status of this issue? I looked over the current docs and found nothing to indicate that Collector keeps working when it can't connect. Likewise, the sticky post at the top says nothing on this topic. We're many months past the March Dev Summit. Was anything announced (positive or negative) on this issue.
I'm more than a little surprised at a design that fails to work in no service zones, but maybe that's because I live in New Mexico where a large fraction of the state has no service and my primary mapping interests are in rural or forested areas.