I'm trying to use a lookup field to Users to set the defaultselectedfields in a combobox but am noticing that the lookup field doesn't return any data.

I can see two rows show up, which is correct but they are empty. The strange thing is how if I use the 'Purchase Requisition Copy Tos' in a gallery I can access the 'Full Name' using the look up field.

Is this a limitation with PowerApps? I don't understand how I can access the data through the lookup field in the gallery, but not outside of it.