So if you have Emergency Powers in hand and fill it with mana you get the popup asking if you want to cast it or not. But if you had it full at the beginning of your turn and Addendum is active it will not ask if you want to cast and cast anyway.
Hello @stikxs,
Thank you for all the information provided, this issue will be investigated!
If you have any additional information that you consider relevant, please don’t hesitate to send me.
Rebeca.