I can't believe this doesn't appear to have been suggested. Provide and option setting (I understand everyone may not want it) to prompt for confirmation any time a currently playing track will be interrupted by any click. How many times people, in group settings and alone, which is how I know, intend to play next or add to end of queue, and end to interrupting the current song and messing up the playlist. Can't be difficult to implement and you'd add a feature Spotify doesn't have either.
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