Autoplay off and still plays suggested songs

[Sonole]

I turn off autoplay on Spotify Mobile for my Samsung Galaxy S9, and even after I turned it off, and even before all the songs on the playlist played (most played, but not all), it still gave me suggested songs, and wouldn't go back to my playlist after listening to some of the suggested songs (usually I've had this problem but it'd go back to the playlist after 2 or 3 suggested). It only went back to my original playlist when I restarted the app. Should this be happening, because I see no reason for there to be an option to turn off autoplay if it autoplays random songs anyway.