I thought it was a bug, but then I realised this is a thing youtube are doing and it's fucking awful.
Edit: double checked and because they moved the layout the Unhook extension isn't working properly anymore to hide this obnoxious crap :(
Edit 2: That's hilarious, they seem to have borked the whole site at least for me with this change.
Mine looks the same, but I only am ever logged in on my TV that has Smarttube app. I almost never get any of these new things, albeit there was a time when it was bitching about an ad blocker. That's Brave on Linux with a Pihole, so I have to be a pretty niche case