They are probably checking and selecting the missions that fulfill the new guidlines for Officer reports daily missions. In future only those foundry missions that are at least 15-20min long will count in for the daily mission.
There were changes made that affect the foundry so it always goes off-line for a while after a season patch. This is a safety precaution because after Season 4 there was a major foundry disaster and they want to avoid that.
Give it a week or two, The missions in there will auto-republish (in most cases) but the short exploit missions will come back with them. Those will have to be manually taken down by the author although I imagine a lot of them will just be forgotten and linger on the lists.