Updating series publication dates - cached?

I noticed one of my series had a book with the wrong publication date showing in publication view. I looked around for a way to edit it and never found anything better than adding it to the book's "Original publication date" Common Knowledge entry. But that didn't actually update anything at the series level. I see from various posts about the new series page at https://www.librarything.com/topic/321038, e.g. #60 and #388, that this is cached and doesn't seem to update very quickly. I've waited ten days at this point. Is there a different process to get these correct or how can we trigger the cache to update?

The case I noticed: https://www.librarything.com/nseries/96/Magic-Tree-House, specifically Night of the Ninth Dragon, which I updated to 2016.

Looking around, I checked the classic case of a series that cares about publication order: https://www.librarything.com/nseries/37/Chronicles-of-Narnia. Even that has the Publication tab acting up, with Magician's Nephew shown as 1951 despite CK being correct at 1955. Honestly having this one showing wrong makes me wonder if we have any control over these dates at all, or surely someone would have dealt with it by now.

>1 ojchase: This is a known bug that the developers have ... chosen to not repair. *shrug* at least that was the impression I was given from when it first came on line. There is no way to trigger the cache to run any faster than they have planned and the dates used have some form of formula that makes everything wonky.

Dang. I couldn't find anything more recent than the original thread. I would have hoped they'd have improved it by now. Thanks for the update.