I know that there have been several discussions regarding IE11 and compatibility mode and issues with Rise in an LMS.
Our team is experiencing a related issue in Cornerstone LMS where the course is viewable but never reports the pass/fail back to the LMS. It does NOT seem to be forcing any compatibility mode, the data just doesn't report.
We are using AICC and have tried all the associated export options. None of them work (Pass/fail, Complete/incomplete etc).