Bummer! My understanding and two cents regarding on this issue is that
Apple Engineers have been working on issues pertaining to Caching not
working on iOS devices and VPP apps mainly. The purge happened because
Apple applied a "Fix" but it did not w...
The apple caching server has been broken for several months. It has
nothing to do with your configurations, specially with iOS updates and
Apps. Apple has been slowly working on a fix and I was just informed
that the Beta 10.2 iOS fixes the catching....
I had just heard from Apple that the Beta 10.2 will fix the iOS and App
Update issues. It sure is taking long to fix this issue. I had reported
it to Apple since the release of 9.3 when I first noticed it.