I had 3 minutes left on my current stakes when the 3 new choices came up. A chest, Credits, and 100 gems. As I sat here waiting for the 3 minutes to pass to click on gems for my next stake they disappeared and credits appeared. I was under the understanding that once the Stake choices appeared they stayed as is, not changed until the timer was up and all 3 changed again. Something seems wrong with this. If Gems appear they should stay in the stake que like everything else. Especially if you are in arena waiting to change stakes. Doesn't seem very fair to put it up and pull it away unless they make it so you can drop current stakes to trade to new one too.