Retain supplier code in POP record invoice function

Within POP, record purchase invoices, there is the option at the bottom of the screen to save and retain the supplier account code - but it doesn't work. (greyed out)

Is it possible that the 'Save and Retain' option within POP could save the invoice details then revert back to the same Supplier code? When entering large batches of invoices from the same supplier it is highly annoying and time-consuming to keep re-entering the same account name.

I have simplified this request as I cannot believe no one else would benefit.