Just had an earn 3500 Support XP with Aura in my squad, played the whole game as Sparks with Aura in squad but not used. Finished game with 2k support XP, but mission didn’t progress. Played a second game to be sure, mission isn’t giving credit or (possibly) only gives credit when you play AS Aura in your squad. Untested for other missions yet, will play a game as Aura now to verify.
Edit: Played a game as aura, still no progress. Unsure if it’s a display bug, will see after another few games.
Edit 2: I’m getting credit now, but not sure if it still has the merc specific error. Testing!