Can’t see this logged as a bug anywhere but others have mentioned it on the forums.
When Urza’s Factory (created by Urza, Lord High Artificer) has been reinforced multiple times, the game soft locks when it triggers if there are fewer gems to convert to blue than the support’s shield.
Heartstone said: @Oktagon_Support Yes, it's still present in r4.1 . Actually, any deck with urza and thassa deep-dwelling will do. Exile Urza with Thassa every turn : Once Urza's factory is above 20 shields, the app crashes pretty quickly. If you'd like, I can record a movie and provide the link
Heartstone said: Yes, Castle vantress was also in my deck. And primeval titan , Goloss and deathsprout to be sure I always have one :-)
Avahad said: so is it when it’s hitting castle vantress activated gems? And if so is that only if it is trying to exceed maximum hand size by drawing the extra cards?