Thank you for the reply. my Arena team and opponent's team are as follows:
My Team
Boba Fett lead 7* lol 85 1 zeta G11
IG-88 7* lvl 85 G11
Greedo 7* lvl 85 G10
Dengar 6* lvl 85 G9
Zam 7* lvl 85 G9
Opponent team
Talzin Lead 7* zeta the great mother
NS zombie 7*
Old daka 7*
Asajj ventress 7* zeta
NS Acolyte 7*
Basically I was executing NS Zombie and it wouldn't revive automatically as it normally would. However once it was "ghosting" in via mother talzin's great mother zeta which states they are "revived" it would just stay in play even though it didn't defeat a character on my squad. My thought is characters that are defeated by an ability that prevents revive they should be gone completely. This might impact Darth Nihilus's annihilate as well.