Identical invoices/invoice lines are created after repeated clicking on the "Save & close" button

Overview: 
Steps to Reproduce:

1. Log into FOLIO as User Diku_Admin.
2. Click on the "Apps" button.
3. Select the "Invoices" application.
4. Click on the "New" button.
5. Fill out all required fields and any other desired information.
6. Click on "Save & close" some times.

Expected Results: Only one invoice is created after repeated clicking on the "Save & close" button and the window popped up with a message about the impossibility to save the same invoices.
Actual Results: Identical invoices are created after repeated clicking on the "Save & close" button.
Additional Information: Same applicable for Invoice lines
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