One of my maps, https://osu.ppy.sh/s/246169, has been in Pending for 3 months without me touching it. The problem likely has something to do with the fact that the beatmap doesn't seem to have a thread (This Beatmap's Thread just gives "this topic does not exist"). I of course haven't revived the map from graveyard during the 2 months now that it should have been graveyarded.