Head coach Steve McClaren was left to look for reasons for a second major collapse by his Wolfsburg side, as they crumbled to a 3-2 defeat at home to Bayer Leverkusen.
The visitors scored three times in the final 18 minutes at the Volkswagen Arena to earn three points, with the Wolves having thrown away a three-goal lead in a 4-3 loss to Mainz earlier on in the campaign.
“That is incredible, but this is football. It is a funny old game,” McClaren said.
“It is the second time this has happened to us and that is very worrying. We controlled the game, but then a couple of minutes turned the game around.
“It is a puzzle. We have got to show character and a reaction in our next game. We still have a lot to learn.”