I have my YouTube Music Premium account linked to my Google Home. It is the same account that I log into Google Home. When I asked Google to play my playlist, it does not play music from MY YouTube Music Account, but instead it plays random music from YouTube Music. It does not seem to be looking into my specific YouTube Music Account. Please advise.
Sorry to hear about the troubles with your Youtube Music account that you're having as I'm sure it's confusing, but I'm happy to look into this for you.
I would suggest unlinking and relinking your accounts to each other and to the devices as that should help with the issue.
Please let me know if you have any other questions.