So i don't know if its just me that having this problem but i like to play against the AI a lot and a couple of times during the games against the new AI decks the special summoning option does not show up for some of the cards.
against the BLS AI deck: I'm going first, i activate The Melody of Awakening Dragon and add a Blue-Eyes White Dragon and a Blue-Eyes Alternate Dragon to my hand, Then i want to special summon the Blue-Eyes Alternate Dragon i just added to my hand via his effect. The option to special summon does not appear.
against Zodiac Beast AI deck: I'm going first, i normal summon my Hieratic dragon of Eset and then i try to tribute him to special summon my Hieratic Dragon of Su that was in my hand, the option to special summon Hieratic dragon of Su does not appear.
against the Zodiac Beast AI deck: going second i have a Hieratic dragon of Tefnuit in hand and the opponent has a Zodiac Beast Drancia on board with 2 set s/t cards. the option to special summon Tefnuit by his eff does not appear.
Is this a bug?