I've had this happen a few times too. I think it has something to do with the controller itself, maybe the touchpad getting stuck somehow, not sure. Usually pressing circle and the touchpad a lot will help reset it, I've never had to turn the controller off/on to fix it so it may be a different technical issue, but sounds very familiar to what I experience occasionally. Never happened before only within the last couple of months. May be hard to intentionally duplicate the effect.