The latest setback means that his side have failed to win at home in the league for three months leaving the manager pulling his hair out.
He said: "We started off badly and didn't get any better. We went behind after 25 seconds, but that left us 89 minutes to pull it back.
"It's difficult to put my finger on what's going wrong at home, but that result and performance has certainly given me food for thought.
"I don't know whether a lack of moral fibre in the team is the problem or something else, but we have to get to the bottom of it."
He added: "I did get a reaction from the players in the second half, but I need a reaction from them in the first half if we're going to do anything."