The screen locker will occasionally get stuck when logging back in from sleep, as in it will allow you to type a password, but it neither rejects or logs in after you hit enter or press the enter button. I was still able to sign in by clicking "change user" and then signing back in to my account on that screen. My session resumed as normal.  This was after a relatively short sleep, so perhaps it was somehow in-between sleep states. I don't recall this ever happening to me before in earlier versions of plasma 6, but it has happened a few times with 6.3.3.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma:  fedora 41 
KDE Plasma Version:  6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2

ADDITIONAL INFORMATION
Using fedora's standard Wayland implementation and the default Fedora variant of Breeze.