Based on https://github.com/wikimedia/puppet/blob/master/modules/mediawiki/manifests/maintenance/updatequerypages/enwiki/cronjob.pp#L42 it should be running on the 20th of every month. According to https://en.wikipedia.org/wiki/Special:WantedTemplates it hasn't run since november.
Maybe someone with access could check to see what /var/log/mediawiki/updateSpecialPages/cron-updatequerypages-wantedtemplates-s1-WantedTemplates.log says on mwmaint1002
Actually it looks like all the --only special pages have stopped working sometime in early december (including one's not in the enwiki file). Special pages on the normal 3 day roatation still seem to work. There was a change in october (d59d853d9cc9) but it looks like it didn't break until a bit after that. cc'ing @Ladsgroup anyways.