Quoted from Pablito:The good news is that CGC has identified this as a s/w issue and is apparently fixing this in the next s/w update. The bad news is that the s/w update has been "coming soon" for months now.
Happened to me the other day. I heard that it's a software bug that creeps up after the machine has been on for an extended period of time. So when it started I turned the game off, waited a few seconds, then back on. Issue disappeared. I'm just glad that it's a software bug that can be fixed as opposed to a hardware malfunction/design issue. In the meantime there's a workaround.