Rovers boss Gary Bowyer was left to rue a slow start as they slipped to a 2-0 away defeat at Rotherham United.
An early strike from Kari Arnason was followed by a Jason Steele clearance that struck Luciano Becchio and fortuitously rolled into the net to sum up a disappointing evening for Rovers.
The visitors improved after the break but Jordan Rhodes missed a great chance from two yards, whilst Shane Duffy saw a header cleared off the line, however the damage had already been done.
"You can't come to any football ground in the Championship and give teams a two-goal start," said the Rovers boss.
"We saw that on Saturday at home, but at least on Saturday they were two fantastic strikes, tonight we've gifted them two and it is not acceptable.
"Straight after the game on Saturday we spoke about the need to start properly here and do the basics properly.
"We had a rally in the second half as we do with the character that we've got, but we've got to be getting in front in games, it is disappointing.
"With the first goal we've got to defend the set-play and we've not done that. Then the second goal is just one of those things that should never happen.
"We have a go in the second half, Duffy has a header cleared off the line and Jordan misses one that you'd put your mortgage on.
"Had one of those gone in then it could have been different, but we've not come away with anything. We can't keep giving teams a head start."