I've noticed what I believe is a bug in my published mission (The Syndicate Extraction remastered).

I was playing through and noticed that pop up dialogs that I had already read (completed and clicked the button to make go away) reappear later on during the mission.

I'd be doing something else, totally not related to the trigger the pop ups were attached to, and then see the Ops buttons appear on the bottom right of my screen and when I clicked them I saw random pop ups that I'd already viewed.

Example: at the start of the map, I have a dialog popup that appears when you reach a marker. I read it, clicked ok and it completed and went away.

Later, I went and talked to an NPC contact, and when I was done with that, an ops button had appeared and it was that first pop up from the beginning of the mission again that I'd already seen.

I have no idea what's causing it. :p

Silly Question. Is it a social zone map?

Ok I've tried to reproduce this and failed. (I even borrowed your project to try it with that. Don't worry, I won't keep it and it's only in QA anyway.)

Does it happen after publishing? Or only when previewing?

I've never run that particular mission...

However, I tried to make what you're describing happen in my mission dialogue. What happened was that I had to make the chat 'fail' and then it could be accessed again later in 'OPS'. That never dissapeared before re-appearing later (though it might in combat, of which I have none?)

Don't know if that is the case...weird.

I have just had this happen in my (unpublished) mission. I temporarily published it and it happened there as well. Here's the thing, though:
The mission branches into two paths at one point. One path is where you use the medicine on your away team, and another is where you use the medicine on some injured patients.

The kicker is that, from my testing, the bug mentioned here only occurs on one path, the "Use it on patients" path. None of the popups get repeated in the "Self" path. Here's the ID if you want to check it out, Zero: ST-HSNSK55ZK.

I think it happened to me both in preview and in the published mission. I can't get it to happen consistently because I'm not sure what is causing it.

Sometimes it doesn't happen - usually when I'm rushing through the mission and only talking to a minimum number of NPCs. But when I do a playthrough where I test every dialogue, it seems to happen - old popups reappear.

1) could it be due to draw distance? like if I walk out of range of where I place the popup object and then walk back into range it's triggering the popup again?

2) could if be some kind of time related thing? Are the popups reappearing because I'm spending so long on the map that they reset and reappear again?

It's a strange thing, but at least it doesn't stop people from completing the mission. I've got some reviews about people saying that "weird stuff" happens though and I assume they are talking about this.

To clarify it's only happening with some dialog popups that are on the map (not the story popups tied to the main objectives).

I am running into this exact same problem. It is the only thing keeping me from publishing my mission.

Project ID: ST-HTY7R9LA2

It is the most complex map in my mission, with a ton of stuff. I really don't want to rebuild that map...it would take me too long.

I thought about making the four popup dialogs happen as "reach marker" objectives, but I don't want to have them appear as an objective in the mission window. I mean, I can do without those popups...but they work so well the first time around.

I have even deleted them and their place markers and recreated them, but get the same thing. And they always reappear at the same point in the mission, every single time.

Well, I decided to go back in and remove the popup dialogs that were repeating, and replacing them with place marker/reach marker objectives to get the dialog out at the right time. I ran through it again and it now works as intended, though I don't like having those four extra objectives just to get text out there.