Hi Paul,
No worries, Bug has been patched by upstream in the meantime.
It even already landed in 24.04 LTS + flavours
So there's nothing to do anymore, closing the bug now.
** Changed in: linux (Ubuntu)
Status: New => Fix Released
** Changed in: ubuntu-mate
Status: Invalid => Fix
This isn't a problem that the Ubuntu MATE team can help with so I'm
moving this to 'linux' which is the package for the Linux kernel which
you say recent releases are the cause of the issue.
Please execute the following command only once, as it will automatically
gather debugging information, in a