Currently, when waiting for a friend in a challenge game to select their deck, the Cancel button is a bright orange Call To Action button. This is confusing, and leads to accidental cancellations of the invitation, as it is the incorrect usage of the orange CTA style. That style should only be used for the most common, most desired action, like Play. In this context, the cancel button should be a smaller, gray, secondary button. This style is used in other places for the cancel button, as well as the not default play button, etc. My guess is that if you fix this bug, your metrics for (accidentally) cancelled friend game invitations will decrease.