The visitors then took the momentum into the closing stages, Chris O'Grady and a Kallum Higginbotham wonder strike securing three points that put the Lancashire outfit 11 points clear at the top.
Coleman said: '"I think at 2-0 we thought it was won. I am so disappointed. I think if we had held onto the 2-0 lead for longer then we would have gone on and won it by more but they have got the goal back and then put us under pressure and we couldn't cope.
"I thought our days of buckling had gone but it has just been laying dormant. They murdered us at 2-1 and that's why they are going to be champions.
"I didn't see the incident but we could be losing our focal point for three games"