You've set failure action of a course to remove from learning plan or to lock the user out after X number of failures, the user failed the course but the failure action is not triggered
Learning (LMS instance)
Reproducing the Issue
1.Create an online item and attach a Scorm course to it
2.Make sure you've set up the item to either lock out the user on failure or to remove the item on the learning plan after failure
3.Deliberately fail the course
4.The course stays on the learning plan
If the course is sending the wrong failure completion status , LMS would not be able recognize the next step/failure action hence the course stays on the learning plan
If the course is not sending the proper completion status on failure , this must be rectified by your Content Developer/Content Vendor.
For further proof on this you can collect course logs and if the course would be sending Incomplete/I value at the end instead of a F/Failure then this would show that the course is not sending the necessary completion status.
course logs failure action LMS learning not failing Failure action no triggered course stayed on the learning plan , KBA , LOD-SF-LMS-CNT , Content , Problem