In some testing we did today, courses published to AICC, in the Success Factors LMS (formerly Plateau), do not close when the Exit/Close action runs. This is only in the latest release of Google Chrome. Function appears to be normal in earlier Chrome versions and in other browsers (Safari, IE, Firefox, Edge).
Publishing the same course in SCORM seems to resolve the problem. Luckily, we got approval to use SCORM last month. (SF was really, really slow to fully implement SCORM.)