Bug? Skeletal Clerics doesnt always revive. huge downside for sacrifice.

I've noticed that even with up to 9 summoned clerics they don't always revive eachother when consistently killed or sacrificed even though several of them have revive active and not on cooldown.

It's like they "forget" that ther'e dead minions to revive, can someone at GGG support please tell me if this is on purpose or a bug?