@TeamYouTube I get an pre-roll ad when watching Wulff Den live on YouTube TV, both on Samsung Tizen TV and Nvidia Shield TV, and I have YouTube Premium. I don’t get the ad on my iPad.
Thanks for letting us know about this. Please make sure that you're signed into the right account. If so, we'd recommend reaching out to our live support team: https://yt.be/help/purchases and they can help get this resolved for you!