We'd like to help. Are you facing this issue on desktop, mobile or email notifications (or all of the above)? Also, is this happening with *all* notifications or just certain types? Appreciate the additional info!
Hmm, have you opted in to receive all notifications on the channel's subscription settings(tap the bell> all notifications)? Also, have you checked our Help Center article on "Manage YouTube notifications" yet: https://goo.gl/oqewiU ? Let us know if that helps.