Challenge Screen Pops Up All the Time

I have been experiencing this as well.  It is not isolated to just one game; it happens on several games and it is absolutely annoying - especially when the challenge screen pops up in the middle of a merge or a sudoko entry and the game in the background is registering an action that I can't even see, and it ends up costing me a life or a wasted merge, etc.  This is ridiculous.  There should at least be an option or something to disable this challenge screen.