Unsubscribing on youtube randomly?

Here lately I have noticed that I am no longer subscribed to some people that I have been subscribed to forever. It's multiple people, and I don't even realize until I see one of their videos is featured, and I watch it, and see that It doesn't say "subscribed" up at the top. Has this been... show more Here lately I have noticed that I am no longer subscribed to some people that I have been subscribed to forever. It's multiple people, and I don't even realize until I see one of their videos is featured, and I watch it, and see that It doesn't say "subscribed" up at the top. Has this been happening to anyone else? Does anyone know why?
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