AttachableRef is empty on Bill object when it's definitely there in QB.

[hyphen81]

When using FindById to get a an instance of QuickBooksOnline\API\Data\IPPBill, the AttachableRef object is empty, even though I can see there's an attachment in the Quickbooks sandbox.

Do I have to query this separately or something?

[hyphen81]

tried querying it separately and the whole object comes back null. ugh.