Dedra Hero Ability Not Working Against Dryax?

This might be something:

Dedra's hero ability says, "If all allies are ISB ..." Death trooper does NOT have the ISB tag. Only Director Krennic's summoned DT gets the ISB tag. So CG made it impossible for all allies to be ISB in the Coliseum. 

If this had been tested in anything like a normal environment, I imagine it would have been immediately obvious that their touted hero ability isn't working. CG really needs to figure out why their QC is so bad.  

EDIT: In the Coliseum "Feature Info," the hero ability is only stated to work with the Jotaz and AT-ST. Why are they sending out a newsletter to tout a new hero ability that won't even work that day? Think things through, CG.