Hi again Tim,
I re-Imaged the uSD Card, leaving the hostname as the default (moode) and then changed the hostname to moode1 in the Configure/ System panel and it now appears on the network as moode1.
It may help with your diagnosis that the RPi Imager does seem to be adding the suffix 1 to the hostname though it doesn't show up in the Configure/ System panel. Thus, when I added the 1 suffix in the Configure/ System Panel. it ends up with moode11 showing up on the network. Dare I say that this is a bug in the RPi Installer
- Robin
I re-Imaged the uSD Card, leaving the hostname as the default (moode) and then changed the hostname to moode1 in the Configure/ System panel and it now appears on the network as moode1.
It may help with your diagnosis that the RPi Imager does seem to be adding the suffix 1 to the hostname though it doesn't show up in the Configure/ System panel. Thus, when I added the 1 suffix in the Configure/ System Panel. it ends up with moode11 showing up on the network. Dare I say that this is a bug in the RPi Installer

- Robin