Boro’s draw at home to Bristol City at lunchtime had opened the door for Millwall to climb into the top two for the first time all season, but they did not manage a single shot on goal in the first half.
The only time either goalkeeper was worked was when Lions keeper Anthony Patterson tipped over Taylor Gardner-Hickman’s free-kick.
Millwall upped the tempo after the interval and Barry Bannan forced a save out of Balazs Toth before Femi Azeez’s in-swinging cross was met by Cundle 10 yards out with his overhead kick finding the bottom corner.
But momentum changed when Sturge was adjudged to have committed a professional foul on Ohashi 25 yards from goal.
Rovers sensed an opportunity and brilliant work from Ryan Alebiosu set up Jorgensen to level matters, but they did not stop there.
Tristan Crama had cleared a Rovers effort off the line before Ryoya Morishita slipped in a perfect ball for Jorgensen to score his fifth Blackburn goal since arriving from surprise Champions League outfit Norwegian side Bodo/Glimt in January.
It was a third win for Rovers in seven games under Michael O’Neill but Millwall will have to regroup quickly as they face trips to the two teams immediately above them in Ipswich Town and Middlesbrough in their next two games.