Hi, latest KDE neon bionic user here:

After 20th october 2018 updates I have an error prompt when laptop turns into sleep mode after few minutes when being unused. I can't wake up like normally thru graphic mode but instead get black screen with information that 'locking screen is broken and unlocking session became impossible...'
fortunatelly the info contains also a quick fix to do:
1. press ctrl+alt+f2 to login via text mode terminal
2. type 'loginctl unlock-session 3' and press enter
3. press ctrl+alt+f1 to switch into graphical mode like it should be normally

Also just before this issue occured I've tried to login as 'Wayland Plasma' session instead of normal 'Plasma' session which turned out to go just a blank screen and system needed reboot.
I always use normal Plasma session.

The thing is I have to do this each time after system goes into sleep mode and after system reboot...is there any permanent workaround or fix to this issue or all I can do is to wait for another updates which maybe will fix this issue (which I hope is temporary)