Did you unpublish this arc? I was going to take a look at it with a couple different characters (see if we could narrow down any causes or triggers), but nothing comes up when I search by your arc ID number.
I am going to guess here. You have a custom group in your mission, with some regular mobs from an in-game group as part of it. Probably the Praetorians or another high level group. And you have an AV/EB that you created, which is why you have the custom group, so you could add it to the old mobs.
If this is the case, the game is WAI. Custom groups are automatically level 1-54, but the high level group mobs will only spawn if the mission is high enough level to reach them. But the Custom AV/EB can spawn at all levels. So when a level 15 team enters the mission, the only thing that can spawn at level 15 is the EB, which means that every spawn point in the map will get that mob.
How did I do?
If you want to have a high level mission, you need something in the mission to set the level. If you want to allow any level to be able to play, you need to use nothing but Custom mobs.
There are a variety of ways to make a mission use the proper levels. I like this one.
Justice Blues, Tech/Tank, Inv/SS
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Fighting The Future Trilogy
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Justice_Blues, not too bad a guess at all. I have custom created the target in each mission. I customized each group by selecting certain types from already existing in game mobs, giving them a new name, that have a level 1-54 range (Archnos for example). There is one ambush mob I will have to confirm, thanks for the heads up.
Note I corrected the ID #, I had a typo. You can also search via Zuana as the author. I'm happy for any info, suggestions etc, in game or via the forums. Thanks in advance for any assistance and/or testing anyone does.
There was a bug that showed up in Beta, with the Family. The group was supposed to cover the entire range the writer had chosen, but some people, I think high levels, would only get custom critters, no Family. Turns out the Family that covered that level were from CoV, and were flagged not to show up in Heroic missions. That carried over to the MA for some reason.
You may have something like that going on, so the mobs you have chosen exist for all levels, but are flagged for one side or the other.
Justice Blues, Tech/Tank, Inv/SS
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Fighting The Future Trilogy
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I seem to have encountered a *glitch* in the MA system. I'll wait for the Quality Assurance Team to finish their review before calling it a Bug. Tech support upgraded the issue to a bug report.
Arc ID 19186
When the Arc is run on a level 50 (team or solo) with a difficulty of Heroic, it spawns as intended. I've tested level 50 on invincible solo, and the first mission spawns correctly.
Any character below level 50 on any difficulty enters a first mission of ALL EB's. This is NOT intended.
My SG's initial run on invincible did encounter another issue, that does not reappear on heroic. Mid way through the second mission map, there was 2-3 full spawns of just AV's. This is NOT as intended. I will update again after I run a level 50 mission team on invincible.
I've unpublished, published, deleted and recreated the Targets in the arc all to no avail.
I am assuming that if this is happening to me, it's happening to other people as well.
Please report this *glitch* to the author if you come across it, so they can report it as well. They may NOT be aware that they are effected by this issue.
My apologizes to the level 12-15 team that attempted the arc to find nothing but EB's to face. And my thanks to the one individual that reported the problem to me.
I guess we not only need to run the arc ourselves after completion, but also try it at different levels to see if the arc is performing as intended.
*Edited for typo in ID #. Argh! Thanks for catching it.