The Leeds head coach was unhappy with the defender's contribution against Watford.
Bamba, 30, has been ‘a tower of strength’ for the Yorkshire side since moving to Elland Road on loan this January. He did, however, struggle against Brighton recently and that trend continued versus the Hornets this weekend.
Leeds took a 2-0 lead in the first half but Watford pegged the home side back to win 3-2.
And Bamba was a big culprit when it came to some poor defending, according to his boss.
That was a source of surprise for Redfearn, who was especially disappointed as he thought many of the defender’s team-mates did a good job on Saturday.
“It’s poor, it’s poor defending. You’ve got to do better,” the 49-year-old said.
“But, to be fair to Sol, he’s been a tower of strength for us recently and it’s very unlike him.
“He started off a bit sloppy with one or two things - clearances and passes into midfield. It’s disappointing because I thought there were a lot of good performances out there.”
Leeds’ impressive recent run, which had seen them top the Championship table in terms of results of late, has now been well and truly halted, with two defeats in a row stalling the Yorkshire side’s momentum.
Next up for Leeds is a clash with Mick McCarthy’s Ipswich Town. Ipswich beat Redfearn’s men 4-1 the last time they met earlier this campaign.