It looks like the plus sign %2b
is getting doubly unescaped in tag names in URLs.
Unanswered Questions => c++ link => https://stackoverflow.com/unanswered/tagged/c%2b%2b
but this lists only tagged c:
Add 11
to preceding URL => https://stackoverflow.com/unanswered/tagged/c%2b%2b11
lists questions tagged c 11.
Clicking another tab then converts the %2b
's to unescaped plus signs.
The "unanswered" tab under the "Questions" section works:
Why are there separate unanswered buttons right next to each other — a website section and a search filter with near identical functionality?