That's definitely odd behavior! Have you tried clearing cache and cookies of your browser? Here's how: https://goo.gl/dwzcyo . Also, does this happen across browsers? Keep us posted.
@TeamYouTube Hey sorry to bother you guys but there seems to be a problem, I watched a dudes video and there seems to be a comment section popping up of the previous video I just watched, here's the screenshot.pic.twitter.com/f2MFxylhvF
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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