Have had the same issue on my PS4. It's mildly annoying when searching for something new, and kinda nice when you're getting back into something you were watching yesterday.

I wish it was selective about autoplay, for certain conditions. Chances are, I don't want it to play when I've never watched a second of any episodes in my life, but it's nice that it autoplays when I click it from "Continue Watching" section.