In September we got the long awaited confirmation button if we try to spend more than 100 gems. Unfortunately this does not apply in the cof when we are offered a new item slot. I think this should be changed ASAP as it happens fast that we hit this button, especially when game is a bit laggy. You think everything is fine, want to open next chest and in that moment the window pops up and 500 gems are gone. Not cool flare!
I complained to support and they told me, the confirmation button does not occur in cof and suggested to post this “idea” in forum. But when this function was implemented there was no word of an exception in cof. So this is either a bug or flare is trying to fool us.