Details:
When using endpoint:
/inventory/containers/bulk
If your container payload has multiple errors, you will only receive an error message referring to the first error found in the payload.
Say your payload has 5 containers, with errors in containers 2 and 3. You will only receive an error message detailing the error in container 2. Once this is resolved, running the same payload again will now reveal an error in container 3.
This is currently a limitation of the endpoint.