if the keeper had fumbled it and the non striker called him through for a run he would have taken it, there wouldn't have been any 'but i thought the ball was dead' crap, this is such a non story
But that didn't happen and they didn't run
When the ball is fielded cleanly by a keeper, the ball is always assumed dead unless it's one of those weird scenarios at the end of an innings where they try to run a bye