Instants/sorceries with sneak need effects added to SneakAbility also

Sneak returns the unblocked attacker to your hand (good), but when the sneaked card is summoned, it is not attacking. When used with the Instant "Last Ronin's Technique", it does not summon "Ninja Turtle Spirit" creature tokens at all (wasting both mana and the card).

"Donatello, Mutant Mechanic" when tapped to add three +1/+1 counters to an Artifact Creature (such as "Ravenous Robots", "General Traag, Heart of Stone", or a "Robot" creature token) it turns them into 0/0 robot creatures before adding the counters, even though they were already creatures. Donny is only supposed to do that with non-creature artifacts and I suspect it is doing it to "Big Mother Mouser" as well, but since it is already a 0/0 robot creature I can't say for sure.

"Quintessential Katana" does not untap the equipped creature after it deals combat damage. Its other abilities (healing 2 life and allowing free equipping to an entering ninja) work fine.