Sending SO to QuickBooks failed!

I want to send an SO to QBO with Katana but i get below error code:

Sending this sales order to QuickBooks failed!
QuickBooks responded with error(s) related to invoice.

String length specified does not match the supported length. Min:0 Max:21 supported. Supplied length:31

I understand the error is saying too many lines but is this really the max?

There are only 16 lines in this SO.

We really need to be able to import more lines if we wanted to continue with QBO.