We'll need to look into this, send the video URL and screenshots. Also, any chance you have a YouTube Channel URL for one of your subs who didn't get the notification? A specific example would be really helpful to investigate. Which device your using to make a community post?
Thanks for confirming. The feature is still in beta while we test and make improvements, so right now we’re not expanding to additional channels. We know there’s tons of excitement, but want to make sure new beta participants have the best experience. We’ll share any updates!