Context: Priestess With Eyes of Blue is in the GY and Deep-Eyes White Dragon, the Blue Abyss is on the field, summoned by its own effect.
In the Omega app, Priestess is able to summon herself from the GY when targeting a Blue-Eyes monster to shuffle back into the deck. However, this should not work since Deep-eyes would not be shuffled but banished instead so therefore not meeting the requirements for priestess to summon herself. What happens in the app is priestess summoning herself with deep-eyes banished. What should happen is deep-eyes banished and priestess fails to summon herself because deep-eyes wasn’t shuffled back into deck due to priestess’ “and if you do” clause.