This issue is a bit old but it still happens in Fedora 35 KDE. Every time a operation is cancelled with Control+C, there is a delay of 1-2 seconds for the cancellation to finish. I installed GNOME Terminal in Fedora KDE and the issue doesn't occur.
Konsole in KDE Neon and in Kubuntu doesn't have this issue.
I can not reproduce that on Kinoite & classic KDE 35.
Metadata Update from @siosm: - Issue tagged with: needinfo
not reproducible here either (stock kde f35), though may still be worth reporting upstream
Cannot reproduce either.
Can't reproduce here. If you can, please report it to the KDE Bugzilla.
Metadata Update from @ngompa: - Issue close_status updated to: Invalid - Issue status updated to: Closed (was: Open)