Optional Assignments in Learning Plans

Summary

Optional Assignments in Learning plans showing Overdue

Content

We have multiple learning plans that are assigned to our supervisors throughout the year. The learning plans have no due date, and all the elements are optional. When the employee views their leaning plan, or view the list of individual learning assets, the assignments are showing with a due date, and as overdue, even though no due date appears anywhere in the Learning Plan on the back side. Is there something I can turn off that prevents this from  happening? I've looked in the Learning Plan widget, but didn't see anything there.