What is the shop or customer experiencing: The shop is encountering an issue when attempting to purchase shipping labels via the USPS Carrier under the fulfilment tab by scanning the Packing slips

What is the expected behavior: The shipping label should be successfully created and purchased.

What error messages are there: “Error purchasing label: USPS ship is not an available carrier.”

Did you replicate: Unable to replicate this, since it's happening when shop's scanning the packing slips under the Fulfilment Tab.

What settings were checked:

Checked shop using Commentsold Shipping

Checked shop trying to purchase the labels in combine orders

Checked it’s happening with few specific orders

Provide examples:

Orders number: 251217, 262166

Additional details: This problem occurs specifically with combined orders packing slips. If the label is purchased manually from the individual order, it works as expected.