If you are not able to reproduce the issue now, and everything is working correctly we will not be able to look at the settings from beforehand as they are no longer around.
As there are many spots for push it hard to say at what spot it broken.
But one thing that does get a lot of people is the push is not enabled after the initial transmit a second transmit with a push enabled transmit configuration.
Also, push will time itself out, and the user will need to transmit to re-enable push again.
Stephen.