Gary Bowyer was left to rue bad defensive play as Rovers slipped to a 3-1 loss at the hands of Brentford.
For the second match in succession Rovers were on the losing side after going down at Griffin Park.
Former Rover Jonathon Douglas gave the home side the lead but Rovers hit back thanks to a 12th goal of the season for Rudy Gestede.
But it was the Bees who grabbed two goals in five minutes in the second half through Andre Gray and midfielder Jota to make it a miserable afternoon in west London for Rovers.
"We are hugely disappointed," said the Rovers boss post-match.
"We got ourselves back in the game just before half-time and then I thought we started the second half well.
"But the manner of all three goals are poor from us. We said last week about the goals we conceded against Sheffield Wednesday and it is the same today and that is the major disappointment.
"The frustrating thing today is we go a goal down and then we start to play, we go two goals down and then we start to play. But the big moment today is when Ben Marshall hits the post at 2-1, if that goes in then it would have given us even more confidence.
"But it is something that we have to address, we cant achieve anything when you keep giving goals away."
Rovers return to Ewood Park next Saturday for their pre-Christmas clash with Charlton Athletic.
Tickets are currently on open sale priced from £17 for Adults, £11 for Seniors and Students, and from £6 for Juniors under 17.
Reserve your seat! Book online today at www.onerovers.co.uk