For over a decade, I have used the KDE-Sys-Log-In-Long as my login theme on all my KDE Neon PC's (/usr/share/sounds/KDE-Sys-Log-In-Long.ogg).
Just restarted my various systems following a routine upgrade to 5.19 only to find that now it only plays the first couple of bars and then stops abruptly. Tried this on three different PC's they all do the same sadly.