Chicago utility Peoples Gas is requesting a multimillion-dollar bump to its already record-high rate increase approved by regulators last month.In November, the Illinois Commerce Commission forced a yearlong pause on the company’s controversial pipeline replacement program while it investigates whether the program adequately prioritizes replacing high-risk natural gas pipes throughout Chicago, where the utility serves about 875,000 customers.The company alleged in a filing with the ICC last week that a “misunderstanding …