See for example Spectacle. Hit the PrintScreen key to launch it and you'll see the launch feedback animation despite having `StartupNotify=false` in its desktop file.
*** Bug 455455 has been marked as a duplicate of this bug. ***
*** Bug 455638 has been marked as a duplicate of this bug. ***
*** Bug 455850 has been marked as a duplicate of this bug. ***
Possibly related: Bug 455126.
*** Bug 456124 has been marked as a duplicate of this bug. ***
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/2594
Git commit 78d80123f1d2efbfa00733390430ce381db9c245 by Aleix Pol. Committed on 04/07/2022 at 15:44. Pushed by apol into branch 'master'. xdgactivation: Properly prevent disabled activation notifications The logic when checking the settings was wrong and it would always notify unless both keys were actually disabled. M +4 -2 src/xdgactivationv1.cpp https://invent.kde.org/plasma/kwin/commit/78d80123f1d2efbfa00733390430ce381db9c245
Git commit 155b3cd4907e619e2ae0ec4feca873a213f839d0 by Aleix Pol Gonzalez, on behalf of Aleix Pol. Committed on 04/07/2022 at 16:48. Pushed by apol into branch 'Plasma/5.25'. xdgactivation: Properly prevent disabled activation notifications The logic when checking the settings was wrong and it would always notify unless both keys were actually disabled. (cherry picked from commit 78d80123f1d2efbfa00733390430ce381db9c245) M +4 -2 src/xdgactivationv1.cpp https://invent.kde.org/plasma/kwin/commit/155b3cd4907e619e2ae0ec4feca873a213f839d0