I cannot change my side deck

When every time I am playing ranking, I cannot change my side deck. It even shows me another deck that I am not playing. I and the other players need to wait 3 min for it every time even I already confirm my deck.

I can’t reproduce this. Maybe send me your deck and tell me what deck shows up that is selected under the arena tab?

I play two games by using thunder dragon in the afternoon. In the first game, it changed to The Winged Dragon of Ra deck, and the second game changed to the Endymion. These two decks I use in the host before I play in the arena. And when the time that changing the side deck, the deck will show what I was played last game but not the deck I am playing.
Sorry for my poor english.