Going through my foundry missions after Season 7, I found that there is a issue/ bug with the Costume NPCs. I don't know if it is caused by the new hiding NPCs feature that has been newly introduced or it is something more serious.
So I will put it on the table anyway so you know about it.
With my Floods at Home series, I have alot of npc contacts some of them you return for a second time. When you see them for the second time they are not there. It even does this with putting a 2 of the same NPCs on each side eof the map. Making the missions incompletable.
With Katra: Continued, on the last to maps I designed a Mount Selaya Temple on Vulcan, to make a sceen simular to ST3: Search for Spock. The Cryptic issued NPC's are ok, just the Costume NPC are under the Temple Platform, and eventually disappear like they do in Floods.
I had a few of the authors in UGC Chat starting to have the same problem, so this might not be isolated case.
I didn't sumit any tickets, but it you want some I go back in and get some made up.
This seems to be a widespread issue. When your character moves a certain distance away from NPCs (ally, enemy, or contact) they disappear. This happens in space as well, making for some interesting space combat. It's happened in every Foundry mission I've tested so far since the S7 update.