I made a custom field in sales invoice.
Put some text as default.
Created invoice (December). Everything is good.
Then “Copied to Recurring Sales Invoice” and when times arrived, created the invoice (January) from recurring.
But, in January invoices, custom field doesn’t show up.
I see the problem. Custom fields do not transfer to the entry screen for creating recurring sales invoices. So the default text is lost. Yet, when a new invoice is created for the recurring sales invoice, the custom field is available once again, as it should be. But since the default text was not included as part of the recurring invoice definition, nothing appears (not even the custom field label).
I am elevating this as a bug for attention.
The latest version (17.1.20) will show custom fields on recurring sales invoices too.