That's weird! Is this happening across devices/browsers? Make sure that the app/browser is up to date then try clearing the cache and cookies: https://yt.be/help/Cko1 . That usually does the trick. Let us know if that helps.
To confirm, have you already tried following the steps outlined here: https://yt.be/help/tG1B ? Also, if you think the claimed content is incorrect, you can dispute it: https://yt.be/help/LKJN . Check out this FAQ page that covers common q’s and answers: https://yt.be/help/claims-FAQ