I have traced this to dracut-install, PR submitted to dracut-ng project via https://github.com/dracut-ng/dracut-ng/issues/2071
- Bug#1124400: update-initramfs no longer include... james morris
- Bug#1124400: james morris
- Re: Bug#1124400: Ben Hutchings
- Processed: Re: Bug#1124400: Debian Bug Tracking System

