Stopping playback selects the clip under the timeline marker, making working with in/out markers painful
Since a couple of releases ago, stopping playback has started selecting whatever clip is under the timeline marker. This is incredibly frustrating when working with in/out markers, because if you begin playback, press [I] to set an in, press [O] to set an out, press [space] to stop playback & then [#] to perform a ripper delete of your in/out section... instead the entire clip is ripper deleted because the action of stopping playback now selects the entire clip. Performing ripper deletes on in/out sections is such basic/common functionality that this is incredibly annoying!
Turn off "Selection follows playhead" in the sequence menu. It gets saved with the workspace, so you will need to turn it off, then save your workspace