Baseline date not being filled on AP invoices with special GL indicator

I am using a special G/L indicator for the first time for AP invoices. When a special g/l indicator is picked on an invoice using FB60, the payment tab only has these fields:

Baseline date blank

Part bank

Normally on invoices without sp gl indicator baseline date is filled from document date.

Is there a piece configuration I have missed for this scenario?

Would appreciate any help with this issue.

Thanks

Alicia