I figured out the cause of this, but I can't determine how to fix it.
1. I have an LTI activity in the course.
2. Change the name of the activity using either quick name change or by editing the LTI activity.
3. Save the new name change.
4. The Item is now gone from the gradebook.
5. Revert the name back to the original name. Still missing from the gradebook.
My questions are:
1. How do I change the name of an LTI activity while allowing it to remain in the gradebook?
2. How do I returned previously removed LTI activity items to the gradebook?