Forcing "updated_ts" update using "mender send-inventory"

As part of our quality checks before shipping devices, I want to connect the device to the internet and force it to check in with Mender. I achieve this using the sudo mender send-inventory command over an SSH connection. However when I pull from the Mender API /api/management/v1/inventory/devices, the updated_ts does not appear to change every time.

This post indicates that the timestamp should be usable as a true “last connected” timestamp. Is there something I’m missing, such as this timestamp not updating on the backend if the content posted by the Mender client with sudo mender send-inventory hasn’t changed?