Hi romulo.daniel.1993,
We would suggest you update to the latest firmware version WW-15.0610.1905.28, and check if the problem still appears.
If you cannot receive notifications, we would suggest you do not enable battery optimization on the apps you wish to receive notifications.
Here are some tests we would like to suggest you try:
Check if notifications are allowed in app info. (Tap and hold the app on home screen > app info > app notifications)
Please allow the apps to "auto start" in auto-start manager. (Mobile Manager > PowerMaster > Auto-start manager)
Check your battery optimization settings, and do not optimize the apps you wish to receive notifications instantly. (Settings > Battery > Battery optimization)
Check your battery mode, and choose Performance or Normal. (Mobile Manager > PowerMaster > Battery modes)
If the problem is still appearing, please tell me which apps, app versions, what kind of notifications cannot be received.
When this problem appears, are the apps cleared in the recent app list or not?
Check super clean mode. Have you allowed super clean on these apps? (Mobile Manager > Memory Cleaner > Super Clean mode Set up.)
Thank you 🙂