Specialization: Voluntary activities are not marking as completed.

Summary:

Specialization: Voluntary activities are not marking as completed.
Content (please ensure you mask any confidential information):

We've a specialization with two sections, one is "Required" and other is "Voluntary".

Learner has completed all the activities in "Required" section and two activities in "Voluntary".

Applications shows all the activities in "Required" section has been completed and Specialization is also marked as completed.

If we go inside the voluntary activity, it shows as completed.

But, none of the activities marked as "Completed" in "Voluntary" on Specialization landing page.

Requesting experts help to fix this issue and want to understand the actual behaviour in such case.