Hi @blake1, while testing nested things I noticed this error too and pushed a fix (Update 2.4.0)!
You will get the message [object, Object] when you are trying to display an object (a thing inside a thing) and not a text. Your way, with ‘Contact’ as the column type, should be working now with this update. You can also do the following when using nested things:
Data type: text
Data source: Search for Companys’s Billing contact’s Full Name
Make sure you sort/filter the search the same way across your table 