NIGEL Clough was frustrated after his team left Peterborough empty-handed despite another fine away performance.
Albion had restricted the league's top scorers to half chances until Joe Ward smashed one in from 30 yards in injury time.
The Brewers manager said: "It was very harsh for us to lose a game that we controlled almost from start to finish that way. It was a very composed, disciplined mature performance in the first half and we created numerous opportunities but didn't get that goal.
"That leaves you open to someone putting a screamer in and that seems to happen to us with too much regularity - it happened at Salford and again today. A lot of the time those fly into the stands but they seem to be going in the back of our nets at the moment.
"We had two great chances early on but Scott Fraser missed the target and then John Brayford. Then we put one across the goal and Lucas Akins should finish but is inches away from it.
"Even in the second half we had chances and situations.
"This a free-scoring team who are near the top of the table but we restricted them to next to nothing and they would have probably been content with a 0-0 at the stage they put one in.
"It's a bit feast or famine for us at the moment. We got four the other night with some brilliant finishes and we can't get one today from similar situations."
The Brewers lost both Nathan Broadhead and Oliver Sarkic to injury during the game and they will have to be assessed before Tuesday's trip to Sunderland.
Clough said: "Nathan felt his hamstring which was one of the reasons he didn't start after 90 minutes on a heavy pitch for Wales in the week. Olly it might just be cramp but we have will have to see."