Thanks for letting us know. Just to confirm, are your subs reporting that no notifications are sending or that your videos aren't showing up in their subs feed? Appreciate the details!
Have your subs check their bell settings and see if they've opted-in to receive all notifications. They may be on the default setting, which is to receive notifications occasionally. Here's a guide to help check that plus the app and device-level settings: https://yt.be/help/AKer