I've added metadata to every part of the transaction object creation, but I don't receive it back from the webhooks, its just null.

After extensive talks with Shippo support, (been at this for months testing packages and code changes), ultimately the only way for me to get the metadata sent to me was to also post to the tracks endpoint.

What this ended up causing was for me to receive double webhooks from Shippo due to posting to the tracks endpoint as well as having the label created through them.

Is there something I'm missing perhaps?