Xero connection not importing all data

Hi,

I've got an issue with Xero data.

Specifically, all data, except invoicelineitem is importing fine.

invoicelineitem data only imports for data in 2018, nothing prior.

Invoices exist in 2017, and I can use any data that isn't in the invoicelineitem table just fine. Any ideas why this field is limited to current year for import?