Need help on dual employment issue

One of my friends wanted to try a software job due to the attractive salaries. He was already working in a mechanical core field company. Uncertain about his coding skills, he chose not to resign from his existing company. Instead, he worked for a new company for 5 months, during which time both companies contributed to his Provident Fund (PF). Now, when applying to new companies, this dual employment is becoming an issue, and his job offers are being put on hold. Is there a workaround to resolve this issue?