Backlog Necromancy is bugged

[Neo001992]

Game ID

903798902

I copied an opponent's Necromancy with my Narset, Enlightened Exile and then the copied Necromancy sacrificed itself during the next end step. Necromancy should only sacrifice itself if it is cast as though it had flash with it's own ability, if you cast it at instant speed some other way it shouldn't sacrifice itself.
There is a ruling calling this out.

• The sacrifice occurs only if you cast it using its own ability. If you cast it using some other effect (for example, if another effect allowed you to cast it as though it had flash), then it won't be sacrificed.(2022-12-08)

https://imgur.com/a/mBPzdLa

Event#275173192 Game#903798902

 

[ManaDrainThis]

So, if I’m understanding this bug correctly, this would come into play if you hit Necromancy off of an Etali, Primal Conqueror trigger. You cast the Necromancy and then your creature will incorrectly be sacrificed at the beginning of the next end step. This bug will impact MTGO’s vintage cube leagues. Please fix!!