Board Thread:General Discussion/@comment-45820645-20200523172321/@comment-9605025-20200524071223

It is a caching issue but not because the counts are cached differently. Each "tab" is actually a link to a different page. Each page is cached separately so if the pages are not cached at the same time, then they show different counts. Whichever count is highest it the closest to being accurate. As with any page caching issue, you can use "?action=purge" to fix it.