SUMMARY
When I use Apply Plasma Settings, Numlock preference is not applied.

STEPS TO REPRODUCE
1. Ensure Numlock On is turned on in System Settings
2. Go to System Settings - Login Screen
3. Apply Plasma Settings, enter password

OBSERVED RESULT
Numlock is off.

EXPECTED RESULT
Numlock On, 

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE Neon Testing
KDE Plasma Version: 6.5.90 (6.6 Beta) 
KDE Frameworks Version: 6.23.0
Qt Version: 6.10.1

ADDITIONAL INFORMATION
I first brought up this bug on https://discuss.kde.org/t/plasma-login-manger-numlock-preference-not-applied/43616/1

Here is a copy of my post:

I am not sure if this bug is with Plasma Login Manager, KDE Neon Testing, or the Qt version.

Plasma Login Manager, when I use Apply Plasma Settings, Numlock preference is not applied using KDE NEON Testing, Plasma 6.6 beta., however on my other testing of Plasma 6.6 Beta on CachyOS, the Numlock setting is successfully applied.

Both distros are on the same hardware:
AMD FX-8370
Nvidia GeForce GTX 750 Ti

Both using Wayland
Both using Nvidia Driver: 580.126.09

KDE Neon Testing:
KDE Plasma Version: 6.5.90
KDE Frameworks Version: 6.23.0 (yes I know that hasn’t be released but that’s what indicated on About this System)
Qt Version: 6.10.1
Kernel Version: 6.14.0-37-generic

CachyOS:
KDE Plasma Version: 6.5.90
KDE Frameworks Version: 6.22.0
Qt Version: 6.11
Kernel Version: 6.18.5-1cachyos