Steps: 

 1. open Spectacle

 2. observe ☑ Quit after manual save or copy (the checkbox, checked)

 3. disable the feature (click to clear the check from the box)

 4. take a screenshot

 5. log out from Plasma

 6. reuse SDDM to log in

 7. open Spectacle

Expected: 

 8. ☐ Quit after manual save or copy (disabled)

Actual result: 

 8. ☑ Quit after manual save or copy (re-enabled)

 9. take a screenshot

10. save or copy

11. unwanted, unexpected quit (the bug's effect at step 8 is very easily 
    overlooked).


Reproducibility
---------------

Please: can anyone else reproduce this bug? 

For me, it's probably consistently reproducible. 


Thoughts
--------

From a UX perspective: it does feel regressive – unexpected quits, following a recent upgrade. I'll not apply the regression keyword, because as far as I can tell: this is, essentially, a bug with, or affecting, a new feature. 

A minor but frequent annoyance, however <https://bugs.kde.org/buglist.cgi?quicksearch=Spectacle+quit> there's no upstream report, so I assume a bug in (or affecting) the ports tree.