FBA Inbound API v2024-03-20 - updateShipmentName -- can you only do it in certain status? "UpdateShipmentName cannot be processed..."

[MetaMan2023]

Trying to use "updateShipmentName" on a fully created shipment (within an inbound plan). Plan & Shipments fully created on left path. Shipments are in working/transit status and have not left the building yet... when trying to rename the shipment we are receiving the error:

ERROR: Operation UpdateShipmentName cannot be processed because shipment she42ae2a6-782b-4c23-8819-XXXXX is in an invalid status.

However we are able to manually rename the shipment within the Seller Central UL using "Rename Shipment" button and we are successfully able to rename the inbound plan (which we do right before this call).

Is this a bug or is there a limitation on renaming shipments to certain status/time?

When a shipment and plan reach a certain status (example, left the building or we are going to cancel it), we want to rename it for clarity.... so we are trying to for example (in this case)

Rename Plan to XXX
Rename shipment #1 AAA
Rename Shipment#2 to BBB

The plan renames but the shipments throw the error.