I wanted to do some strikes to finish some other quests and it gave me a strike for a Moon story mission I didn't want to be spoiled on yet (it seemed like it might have been a much later story mission I'd thought at the time), so I left the strike to find a new one. But now, the icon to launch "The Scarlet Keep" is missing from the moon, even though I have the quest in my quests menu. I've restarted the game, doesn't fix it. It seems like my only hope now is to keep launching strikes until I find it, which could take ages. [b]edit:[/b] For anyone else with this issue, it seems you can launch the strike through the Blue strike icon instead after this bug happens, it's to the right of the Moon map. I kept looking for the red story mission icon and completely missed that. Still a bug, the story mission launcher on the map itself should remain until finished... but at least there's a workaround.