I am not having any issue with Kubuntu 24.04
Code:
fred@z170-noble:~$ grub-install --version
grub-install (GRUB) 2.12-1ubuntu7
fred@z170-noble:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04 LTS
Release: 24.04
Codename: noble
fred@z170-noble:~$ echo $DESKTOP_SESSION
plasma