Whenever I try to add the "time" tag to a question and click "save changes", the tag disappears. All other tags get saved properly.
Sorry I completely misunderstood what you meant! Thought you were talking about HTML.
I’ve stopped the time tag being removed on questions now. I’d copy-pasted a list of the most common words to prevent tags like ‘the’ or ‘and’ being used, and ‘time’ was amongst those.