FileMaker Go not printing signatures

Hello

I have a script which prints from the iPad but the problem is that it ignores the container fields which have signatures in them. This area is blank the rest of the document prints fine.

This script works fine on a computer the signatures print.

When I save as a PDF on the iPad the signatures are there.

Any suggestions would be appreciated. Filemaker Go 18 and 19 both have the problem. I have updated the iPad OS.

On the computer we use v19.

Thank you

Chris