Make Stop Playback feature work on one single client only instead of entire Account

I have many friends who use several clients on there Plex account. Sometimes they pause a show and it stays on the Now Playing screen for days. The addition of the Stop Playback feature was greatly appreciated as it gave me a way to clear these instances from my screen.
Just today I learned that if I use the Stop Playback on one particular client it also stops any other clients they are watching on the same account. I do not want to stop the client they are viewing just the one that is not being watched.
Can this be accomplished? Or was it intended to be that way but is just a bug.

Early 2021 clean-up: implemented (cancel/stop playback only stops the selected playback)