[[Cackling Counterpart]] froze the game when the AI attempted to copy its face-down manifested card. It just hung until I quit.
#Cackling Counterpart Bug (Commander)
thin falcon
gray bloomBOT
Instant
Create a token that's a copy of target creature you control.
Flashback 
(You may cast this card from your graveyard for its flashback cost. Then exile it.)
late sierra
@coral jackal can you try to debug this?
coral jackal
nah sorry, when experimental features are enabled I'm out