Foreigner's album "Agent Provocateur" marked a significant milestone for the band, but internal tensions were brewing among the main collaborators. The album followed the success of their hit ballad "Waiting for a Girl Like You" and featured another ballad, "I Want to Know What Love is," which became their first and only No. 1 single. The shift in sound and focus on ballads caused friction within the band, leading to Lou Gramm's departure after touring for the album. Despite the album's success, the internal conflicts ultimately led to the band members going their separate ways in the following years.
Source: https://ultimateclassicrock.com/foreigner-agent-provocateur/