I generally keep up with Experian via the app on my iPhone. It usually updates every week, or more often if there's a significant change. My score has been the same - 697 - for months now with the exception of a one-point dip back in May/June, which was recovered when I opened my PayPal MC. So I'm not necessarily sure there's a problem with Experian as far as I'm concerned; I do know that FICO scores are much less volatile than, say, Vantage scores.
I've also noticed Ex updating information, thus scores, slowly this month. In my (limited) experience they are typically first by a day or three. I've still got payments and CLI from over a week ago that have updated on TU & EQ that haven't with EX. Hopefully this is a short term issue and fixed soon.