Has this happened to you?

I went on youtube to watch a video from a channel I’m subscribed to and is marked as “watch later.” I went to the watch later tab and there were 0 videos when there should have been 27 or so. I also wasn’t subscribed to any of the channels I used to be subscribed to. I was only subscribed to one channel. It was PewDiePie, to whom I have NEVER subscribed to. I then checked if I was logged into my account and not anyone else’s. It was my own. I wasn’t sure what to do so I cleared all date from my browser and tried logging in again. The second time my account was completely normal and I was no longer subscribed to PewDiePie. Has anyone else experienced this?