I've noticed that in a few missions the super backdrop 2.0 starfields are not shown in some of their zones:
B5M3: Zone 1
B5M4: Zone 2
B6M1: Zone 2
The backdrops are defined in the mission files, but they're not shown in game. Possibly noteworthy is that the two in battle 5 are the zones containing Dunari's casino (although there is no issue in B0M2). I've also noticed that all the non-starfield backdrops appear to be duplicated in all the mission files I've checked.
Could anyone confirm?