SHO/SO edit, Incorrect status for newly added Items to processed SO

Case 1:

Expected result – Line item status should be Ready to Ship after steps:

1. Create SO, Add 1 Item(Use in Stock), 2-nd Item(Create PO Request → Process SO
2. Open SHO → Pick&Ship Order
3. Reopen SO, add Item → Save SO → In Current Availability form select “Use in Stock”
4. Reopen SO and look to the line item Status

Case 2:

Expected result – New added Item should be added to the SHO in Not Ready to Ship  status after steps:

1. Create SO, Add 1 Item(Use in Stock), 2-nd Item(Create PO Request → Process SO)
2. Open SHO → Pick&Ship Order
3. Reopen SO, add Item → Save SO → In Current Availability form select “Use in Stock”
4. Open SHO where was added the newly added item, and  look to the SHO status