Notifications are not sent from the alternative editor

Unfortunately some custom editors will not send the push, you can try adding the custom post types options we provide: https://documentation.onesignal.com/docs/web-push-wordpress-faq#for-posts-created-from-3rd-party-plugins

or use our customization filters and hooks to send the push using our API: https://documentation.onesignal.com/docs/web-push-wordpress-faq#customizing-wordpress-plugin-behavior

For faster support, please reach out to [email protected] and someone from our team can assist you directly.