happens to me too, since 4.0. Before never ever happened.

If you select the dead body of a resurrecting ninja and you use the mystery asap the game seems to think that those ninjas are still dead and even if they resurrect the system selects somebody else like if you were on auto. Now seems that you need to wait for the ninja to resurrect and click on it AFTER it resurrected, but this is an issue as big as a mountain for dbp hidan since means is no more interruptable if the caster click on his mystery asap because there is always a bit of lag between the animation of him resurrecting and your chance to click on it at the right time.

To be clearer, most of the times even if you click on him while you see the resurrecting animation the ninja is still considered dead.