Besides a profile picture change last night and adding a Brand Channel yesterday, nothing was changed. The name was never touched, but for some reason changed to add Brand Channel to the end of it. Nowhere else does it say Brand Channel on the end.https://twitter.com/TeamYouTube/status/1171529374761287682 …
Is this happening across devices? Make sure that the app/browser is up to date and try clearing cache and cookies. That usually does the trick. Hope that helps.