Printing preview of pdf on iOS not working.

Hi All,

Been developing an app that generates a PDF and prints or saves it. Initially developed using web but since copied to my Android/iOS app. All was good until I tried to print from iOS device. It just hangs on preview.

this looks like its an historic issue that was fixed???

The research I have done so far identifies it as a thread issue that iOS does not like. I am using the latest builds

  pdf: ^3.11.3
  printing: ^5.14.2  

and code straight from the example files

      final pdfBytes = await pdf.save();

      await Printing.layoutPdf(onLayout: (format) async => pdfBytes);

here is my setup:
[✓] Flutter (Channel stable, 3.38.9, on macOS 26.3 25D125 darwin-arm64, locale en-GB)[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)

[✓] Xcode - develop for iOS and macOS (Xcode 26.2)

I am using an iPhone 11 Pro to test with, no simulators.

Going round in circles for 2 days now on this.

anyone any pointers?