I tested. When I set the order in status "To Close" the requirement and the expected receipt still shows in the forecast report.  I cannot replicate you issue there.

But set status back:

I find in the action menu an action with name Update status:

It works. 

But if you use work centers and operations, the work order will be in status: Finished. You need to manage the work order:

Go to Manufacturing->Operations->Wokr order.

Select list view an filter on status finish.  Search for the manufacturing order related and tick off on the left. The action menu appears and you should find the same action: Update status. Process it.  This also changed the status of the manufctauring order.