I've been browsing MSE for quite some time and I'm familiar with the fact that,
All tags under a question follow the rule that, mandatory tags come first (discussionsupportbugfeature-request), followed by red mod tags. Regular (white) tags come last.
However this question has its red mod tag going to the last. I'm afraid this is a "general" bug that occurs on more questions.
Screenshot:
Although the shot is taken from a mobile, this bug affects desktop view, too.