Intermittent problems are difficult to troubleshoot.
If it was not interference maybe your transmitter hiccuped. Or maybe your receiver hiccuped. Maybe it was the processor. Unfortunately, chances are you won't find out. In some ways it would be good if it got worse. Kind of like an episode of "House". Make it sicker to give you a better idea of what is wrong
. I think someone a year ago or so was talking about how they went through a couple wireless units. I don't remember if the outcome was bad design, bad units or inconclusive. Nor do I remember what make they were.
I think wireless units are great but things like this are why I stay with wired networks whenever possible.