A few weeks ago, I suggested a new tag related to 4K. The suggestion had been accepted but right now I don't see the tag anymore.
Is this normal? There is some regulation related to the evolution of the tags?
The suggested edit 151881 shows that 4k was the tag that was suggested to be added, but the post revisions shows that retina-display was added. 4k was merged with retina-display, but retina-display is a synonym of display, and as such /tags/retina-display/synonyms redirects to /tags/display/synonyms which doesn't show 4k as a synonym, because it isn't. The bug here is that the question shouldn't be able to be tagged with retina-display and display at the same time, as the former is a synonym of the latter.