The rewards already fixed by the time you enter trial breakthrough. The card flip is a joke because of that.
I don't know why they have that card flip feature when everything we receive are fixed. Well to be honest it not that bad because thats how normal survival work right?
It's just the card flip system in trial breakthrough made an uncomforable feeling for players and made players think they're being cheated.
IMO they should return the card flip to normal just like TI reward or delete that feature in trial breakthrough.