It was the third time this season the Potters have let in four goals and Hughes admits it is now an issue.
"Jack's a loss for us, something we were not expecting," he said.
"Last year it hurt us (when he was injured).
"We go with what we've got, and we have to be better. We have an opportunity on Wednesday (against Hull) and Saturday (against West Brom) to turn things round very quickly."