Sys-net stopped randomizing

[apparatus]

This:

@taradiddles

If you want to decide per connection, NetworkManager provides an option to not send the hostname:
Edit the saved connection files at /rw/config/NM-system-connections/*.nmconnection and add the dhcp-send-hostname=false line to both the [ipv4] and the [ipv6] section.

Won’t change the hostname, it’d just stop DHCP client from sending your hostname.