after doing the discover software center and rebooting these are the things that broke, cmedia audio stopped working in the browser (brave,firefox,vivaldi) and elisa/vlc, however system sound test audio is working. Snap apps stopped launching required apt reinstall of snapd and snap refresh. Fastfetch is broke with multiple displays. Restored system to 6.18/plasma 6.5.4 and will stay at this level.
You are using a version of Kubuntu that is not released yet and is under heavy development by both Ubuntu and Kubuntu. This sort of thing is normal at this stage, to be honest.
Try again in a day or two.
thanks for the feedback - I hope that the developers are aware of this. I have a test system with built in audio that is working with 26.04 – 6.19 – 6.6.2 and no snap apps issues
one other bit of info - 26.04 – 6.18 – 6.5.4 - no issues at all - this info might help the developers
Actually it is completely unrelated to KDE Plasma or the kernel.
This sort of component upgrade glitch is not uncommon when things are still in an Alpha sort of state.