restart plasma session open dolphin hover dolphin entry in task manager and click red X button to close it nothing happens
The red cross asks an app to quit, it doesn't force kill it. Was your dolphin frozen at the time you encountered this?
Not frozen. I can reproduce using system settings instead Dolphin.
Also reproducible on neon dev unstable.
Can't reproduce, works fine for me. Please attach the taskmanager config from your plasma rc.
Updating status.
Created attachment 111459 [details] plasmashellrc
Thanks for the update; changing status.
I just noticed that this bug is reproducible only when task manager has NO pinned icon. If some icon is pinned to task manager, red X works as expected.
Can not reproduce on Arch Linux, plasma 5.13.5.