Mother Talzin Lead Zeta not always working

While that looks like a bug, it actually isn't. Mother Talzin's lead ability is selecting a random dead nightsister each time. Because both Mother Talzin and Daka are dead in that scenario, it picked Mother Talzin by random chance. However, Mother Talzin was killed by DN's annihilate, which says that she cannot be revived. Because of this, no nightsister is revived for that basic.