Confirmed Gift of Doom morph not working

[EnforcerX]

Game ID

#869351532

When using Gift of Doom morph ability, when resolving the trigger to attach to a creature, it says it's not a valid creature and goes to the graveyard. I had a Meathook Massacre out, so when ordering the triggers after sacrificing a creature to morph, I did everything the proper way only to have it say "not a valid target" and go to the graveyard. I recreated this situation in solitaire mode and the same thing happened.

 

[EnforcerX]

When testing this out in solitaire mode, it happens whenever you try to flip Gift of Doom and attach it to a creature. It says "Creature #1 unable to attach to ---". It looks like its still seeing it as a creature and not an Aura. Have tried multiple times with the same result.

 

[EnforcerX]

After reading other comments, this looks like it is a bug with all creatures that transform/flip to become an aura.