System details:

• Operating System: Arch Linux
• KDE Plasma Version: 5.22.5
• KDE Frameworks Version: 5.87.0
• Qt Version: 5.15.2
• Kernel Version: 5.14.11-xanmod1-1 (64-bit)
• Graphics Platform: Wayland
• Processors: 16 × AMD Ryzen 7 4800H with Radeon Graphics
• Memory: 15.1 GiB of RAM
• Graphics Processor: AMD RENOIR

How to reproduce the problem:

1. Put the computer to sleep mode
2. Wake it up
3. Enter the password to the KDE prompt -> Unlocking failed
4. Switch to another TTY -> type in my username -> Login locked for 10 minutes after 3 wrong attempts

It's because KDE automatically enters a blank password when waking up or something? Also, this does not happen all the time, sometimes it works, sometimes it doesn't but not really frequently. Any ideas ?