DHCP Option 12 "host name" with wrong value

Dear community

An MBA with Sequoia 15.5 shows a strange behaviour when requesting an IP address for the wifi from the DHCP server.

In the request the host name in option 12 is set to "Mac". The real computer name is in the form abcmba0001 and all the following terminal commands show this name:

hostname

defaults read /Library/Preferences/SystemConfiguration/com.apple.smb.server.plist | grep NetBIOS

defaults read /Library/Preferences/SystemConfiguration/com.apple.smb.server.plist | grep ServerDesc

dsconfigad -show | grep -i 'Computer' | awk -F "= " '{printf $NF}'

nvram -p | grep computer-name

echo "${HOST}"

sudo networksetup -getcomputername

sudo systemsetup -getcomputername

echo 'show State:/Network/NetBIOS' | scutil | grep "RegisteredName"

echo 'show Setup:/System' | scutil | grep "ComputerName "

defaults read /Library/Preferences/SystemConfiguration/preferences.plist System

scutil --get LocalHostName

scutil --get HostName

scutil --get ComputerName

DHCP request for the wired connection have the correct name.

This happens on other MacBooks as well. So we end up with several "Mac.domain.net" entries in our DNS.

The behaviour seems to have started after we updated the MacBooks from Ventura to Seqoia.

Any idea where this "Mac" entry is coming from and how we could change that?

best regards

Roger