It came with a handful of issues for. Clicking the progress circle in the panel crashes the whole plasma shell. Number of files being transferred and size is now missing. "Copy" in spectacle doesn't actually copy to clipboard. It muted my notifications sound without me doing anything to it. I've reported several bugs.

Also on Fedora.

Discover no longer shows a progress bar in the lower right for updates from rpms. Flatpaks do work, though.

Opening Spectacle immediately opens the area select screen, but causes any open menus to close, negating the usefulness of screenshots somewhat...

(Also, a recent update made my boot take way longer. Like...3 seconds to 1-2 minutes. It's weird, and seems to be some kind of hardware issue...)

only issue ive had is that neochat freezes when resized by a script (krohnkite), but nothing with KDE itself.

Nope, but I'm on Arch with Plasma 6.4.2

Sometimes plasmashell completely stalls for me now, and I have to force reboot, killing it seemingly does nothing

HDR broke for me

I mostly have problems with the Discover Store not letting me download themes, it will crash out hard! I haven't noticed many more issues outside of that on KDE 6.4.