mmm No Ken, I don't think it is because devices need an upgrade, I suspect they have been upgraded. Apparently, and I am not a Crapple user, iOS12/12.1 has had more problems than any other release of an iOS since Jobs went to BSD with NextStep. My understanding is that iOS has been a really stable and reliable product - until now. (My issue with Apple is how they look at "Open Source", seems their view is somewhat narrow and restrictive about what "Open" means.) So I really can't see how Moodle can deal with this if the device is the issue.