Bug 1022976 - [Collection] Intermittent adding records does not work

https://bugzilla.mozilla.org/show_bug.cgi?id=1022976

TC: http://treeherder-dev.allizom.org/ui/#/jobs?repo=gaia&revision=2dd1612b2fae8cd9dd9ba6ba49850c7081084526
:+1: