@TeamYouTube can we get an explanation on why our subscribers are not receiving notifications and why our thumbnail is not what it is, we uploaded a new thumbnail 17 hours ago but the previous thumbnail is still displaying, also our popular upload playlist always gets disrupted..
Thanks for sharing all the details. We suggest getting in touch with our Creator Support team. They can look into this further for you. Here's how: https://goo.gl/BxLi8H . Hope this gets resolved.