SUMMARY
When resuming from sleep or hibernate that is triggered via a lock screen button, it tries to automatically log in with a empty password field, which fails; this is not just cosmetic but can actually lead to lock-outs (which happened to me while debugging https://bugs.kde.org/show_bug.cgi?id=510992).

STEPS TO REPRODUCE
1. Have "empty password login" disabled (have a password on your user account)
2. Lock the screen
3. Click either "Sleep" or "Hibernate" button
4. Resume
5. Observe the Screen-locker trying to automatically log back in with a "Unlock failed" plus animation

OBSERVED RESULT
Screen Locker tries to automatically log in with empty password.

EXPECTED RESULT
Screen Locker should not try to automatically log in.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.20.0
Qt Version: 6.10.1
Kernel Version: 6.18.1-1-MANJARO (64-bit)
Graphics Platform: Wayland
Processors: 22 × Intel® Core™ Ultra 7 155H
Memory: 16 GiB of RAM (15,1 GiB usable)
Graphics Processor: Intel® Arc
Manufacturer: LG Electronics
Product Name: 17Z90SP-G.AA78G
System Version: 0.1

ADDITIONAL INFORMATION
Note that the only configuration setting i could find is "Screen Locking -> Delay before password required", which is set to "Require password immediately".

Note that this *only* happens when the Sleep / Hibernate is triggered by the lock-screen, not if triggered via the start-menu or "systemctl sleep" or any other way.

PS: in case it is related to this, i currently have removed the executable permissions from "/usr/lib/kf6/kauth/wakeupsourcehelper", but it also happens if it has executable permissions.