SUMMARY
I have configured from settings, in Desktop Session:
- Session Restore set to "On last logout"
- ingnored applications: spectacle

If i login the desktop, spectacle still starts. 

STEPS TO REPRODUCE
1. Install KDE Neon stable
2. set desktop session as above
3. log out, login.

OBSERVED RESULT
- spectacle still starts
- the same with asbru-cm
- it looks like "ignored applications" does not work 

EXPECTED RESULT
- spectacle shouldn't start if added to the list of ignored applications

SOFTWARE/OS VERSIONS
Operating System: KDE neon 6.2
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.8.0-51-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 15,3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: Dell Inc.
Product Name: XPS 13 9380

ADDITIONAL INFORMATION
I think this has to do that we still have "fake session restore" as mentioned in https://bugs.kde.org/show_bug.cgi?id=436318. I also understand we are waiting for wayland to add the capability: https://invent.kde.org/plasma/kwin/-/issues/113. So I'm not sure this should be an open bug: can it be fixed in "the fake session restore" or should it be closed as we will get a "true" session restore. I just wanted to mention this behaviour and didn't see among the other plasmashell/SessionManagement. @devs: you can decide what you want to do with this bugreport: close it, park it or close it. I just wanted to do my bit on reporting bugs.