We have a problem with the recently deployed extension WikidataPageBanner. It is supposed to show a bottom line with TOC. But some of the pages contain the TOC line with symbol "1" right under the banner and the standard Wikimedia TOC on its regular place before the first section. This problem is solved by purging the cache, but it happens way too often. Yesterday I have noticed it at least 15 times. Purging of the cache had temporary effect, and the problem appeared again after 1-2 hours, even though no edits were done to that pages.
Today we tried to track the problem and arrived at rather confusing results here:
We identified several pages where the problem appears:
but it does not appear for all users. For example, I don't see it when I am logged in, and I see the problem when I log out.
Altogether, this became a frequent and annoying problem that needs to be solved. Wrong performance of the pagebanner extension has huge (and unpredictable) influence on the appearance of Wikivoyage articles.