Nobody of course is suggesting that this is a viable way to play the game in a general sense, but if you're unfortunately hit by this bug, it's not completely worthless to play offline anyway. I say this because right after release I actually intentionally played without powerups for WAY longer than I needed to in order to bank coins. When they changed the system and made that kind of grinding pointless, I was amazed at how quickly I was gold-starring just about everything I played. I really believe that the practice I got at focusing solely on staying in Blitz mode and efficiently clearing multipliers without the benefit of powerups paid real dividends when I finally got started using them.
But hopefully this will all be resolved soon and it will become a moot issue; until then, though, I think some people may be surprised how much some offline practice could actually help improve your game.