@YouTube what is going on today? I've got a playlist on, and rather than playing through, it keeps on (randomly) deciding to play the same song over and over and over again, until I intervene. Doesn't always do it. Just sometimes.
That's odd,is this happening across all browsers and devices? Usually, some troubleshooting steps fixes this – clearing cache/cookies, resetting browser settings,reinstalling YT app (on mobile). Also, make sure that the circular arrows (repeat) is not lit. Keep us posted!