Only Link Local IPv6 after upgrading to 22.04.4 LTS from 22.04.3

[David]

After I ran the updater last week, my computer could only have a Link Local address for IPv6. I have now confirmed that IPv6 works normally when I install a fresh copy of 22.04.3 LTS and has the bug even after a fresh install of 22.04.4 LTS. Previous data and fault finding on this fault can be found on 2 Ask Ubuntu Posts I made regarding this fault during the last week (Note: Originally I thought that this was just an mDNS6 fault, hence the inaccurate title on the first post):

First Ask Ubuntu Post: https://askubuntu.com/questions/1503895/cant-ping-dynamic-ipv6-xubuntu-hostname-from-kubuntu-laptop

Second Ask Ubuntu Post: https://askubuntu.com/questions/1504030/only-ipv6-link-local-address-after-ubuntu-update

The Ubuntu Release I am currently using is:
Description: Ubuntu 22.04.4 LTS
Release: 22.04

network-manager version reports as:
  Installed: 1.36.6-0ubuntu2
  Candidate: 1.36.6-0ubuntu2
  Version table:
 *** 1.36.6-0ubuntu2 500

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: network-manager 1.36.6-0ubuntu2
ProcVersionSignature: Ubuntu 6.5.0-18.18~22.04.1-generic 6.5.8
Uname: Linux 6.5.0-18-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Feb 24 16:02:45 2024
InstallationDate: Installed on 2024-02-24 (0 days ago)
InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240220)
IpRoute:
 default via 192.168.0.1 dev wlp3s0 proto dhcp metric 600
 192.168.0.0/24 dev wlp3s0 proto kernel scope link src 192.168.0.203 metric 600
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
nmcli-nm:
 RUNNING VERSION STATE STARTUP CONNECTIVITY NETWORKING WIFI-HW WIFI WWAN-HW WWAN
 running 1.36.6 connected started full enabled enabled enabled enabled enabled

[David (bluesilent9)]

Just ran Ubuntu Updater today. It included a bunch of updates including Linux Image 3.26 > 3.29. After reboot I now have IPv6 addresses again and mDNS6 hostnames are correctly working on the local network.