I have now had issues multiple times while using mother north in raids. Her revive fires off, but my heroes are still greyed out and cannot use their abilities or attack. they even have minions above them but will not fire or attack.
After MN use do you move any tiles?
If MN revive somebody but you make move and your revived heroes gonna die after this move they will be gray.
But the dead never have minions… If that really was the case, it might have been buggy there.
Only Ameonna in ghost mode can be a little bit opaque and simultaneously have minions.
Post up pics/video is you can. This would def be a bug.