Arena Stake vaishing when going to claim winnings.

As it says, my winnings keep vanishing when I go to the Arena when I see it says my winnings are ready. I have not been beaten by anyone to take these winnings from me, they are simply vanishing and being replaced by the new stake.

This is getting annoying as it has happened about three times in a row now. If it happens and the stake is gems, a leader card or medals....I won't be near as calm, i'm sure. Haha.

The same thing happened when I beat somebody and looted their chest. Instantly it was gone. Vanished. That has happened twice. I know it's not just timing coincidence.