This started happening a couple of weeks ago. I keep getting logged out of Collector repeatedly. Having to log on to Collector each time is annoying but did not cause a huge issue for me since I am setting up the map from a WiFi-enabled office. However, we had an offline field data collection project, and this issue cost us a lot because the field staff was logged out of Collector automatically while they are out in the field with no internet connection.
I would like to know if this is a bug and what is the workaround to avoid the automatic log-out.
We are having this same problem. This is causing problems with the field crews.
I contacted ESRI support. The first thing to check is if you are running the latest version. As of this date July20 2017 it is version 2.2.
We are using iPhone 6s
ESRI only support the latest Collector version. In this case it is 2.2