(Bug) Certain mobs worth no XP

Okay so after getting feedback on one of my arcs (thanks to Zamuel and Fred) informing me that some of my mobs from a custom group were not giving any XP, I went in to have a look, made some changes, and playtested the arc.

I'd assumed based on the feedback that GR had introduced a few bugs that were pulling mobs from my "boss holding group" - and as a result the 'attendants' to my boss spawns were only awarding 25% XP. Well, turns out that's not the case. After checking, all of my 'set enemy group' options are set to groups that have minions, lts., and bosses, and should therefore award 100% XP.

So here's the bug: In two of my missions, I've got destructible objects guarded by members of a custom group - the custom group is composed entirely of 'non-zombie' Vahzilok (Reapers, Morts, and 'standard' Eidolons). The purpose is to keep zombies from spouting dialog that you'd never expect to hear coming from, well, zombies. *But* for some reason the mobs that spawn to guard the destructible almost never award XP. Mind you, it's not reduced XP, it's none at all. "You have defeated Reaper." That's it. No reward text whatsoever.

And it's not consistent. From among four destructibles in two missions, three had guards that gave no XP, and one had guards (still from exactly the same custom faction) that gave normal XP. Patrols, and guards spawning with boss details are giving XP normally (although, to be fair, they're using the standard Vahzilok faction.

The destructible guards are always Reapers (even though the faction does have lts and bosses), although that doesn't come as a shock - my playtest character is on 0/x1, and the guards are set to 'easy', which, IIRC always spawns two minions as guards - I've never seen it spawn a lt instead. Doesn't mean it can't - just that I've never seen it at that setting.

Anyway, that's all of the relevant information I've got. I did look over the forum to see if anyone else had reported this, but I didn't see anything (and the fact experienced MA folks were thinking it was because the group didn't have all three ranks - when they actually did - leads me to think that this is a new bug none of us knew about).

If there's a workaround (other than perhaps just setting the guards back to the standard Vahz faction), I don't know of one. Any ideas?

Did you just hit test and start testing or did you publish it and played the published versions?
You never get any rewards in test mode, nor can you get debt when you die iirc.

It needs to be published for any form of awards afaik.