[16.0] sale_manual_delivery create delivery button missing after first delivery

[ChristophAbenthungCibex]

Module

sale_manual_delivery

Describe the bug

After confirming the first delivery the button "create delivery" is missing despite that not all parts are delivered.

To Reproduce

Affected versions:
16.0

Steps to reproduce the behavior:

1. Login as "admin"
2. Go to "Sales"
3. Create a new Sale order
4. Set a customer
5. Set "Manual delivery" to true
6. Add a product with quantity 4 (For example: [FURN_6666] Acoustic Bloc Screens)
7. Add another product with quantity 2 (For example: [CONS_89957] Bolt)
8. Click "Save" button
9. Confirm the order with the "Confirm" button
10. Click "Create delivery" to create a delivery
11. Set the received quantities to 2 for the first product and to 1 for the second one (only half of products are delivered)
12. Click "confirm" to confirm the delivery
13. Click on the smart button "Delivery"
14. For the created delivery add done amount accordingly (2 for the first product and 1 for the first) and validate the delivery
15. Go back to the sale order
16. The button "Create delivery" is missing

Expected behavior
The button "Create delivery" should be there to create a new delivery because only parts are delivered.
The screenshot shows that not all products are delivered (quantities are marked blue) and the button is missing

[ChristophAbenthungCibex]

Any updates on that issue?