Runner2: Future Legend of Rhythm Alien causing Wii U lock-up?

I got an email from reader Marl0 about a lock-up issue with Runner2 on Wii U. Every time the reader tries exit the game from the Runner2 main menu, the Wii U goes through an endless loop of returning to the Miiverse screen. This requires an unplug of the system from its outlet to fix.

I can vouch for this issue, as it's happened to me three times now...and I've played three times today. We're also hearing about some menu option issues, but those aren't as widespread.