Uncommanded notifications on Galaxy Note 9

[Jenny Eldershaw1]

My husband and I both have Note 9s.
When he gets an email (Gmail) he gets a notification which is a bird call he saved to his music library and chose as the email notification tone.....one of the very few changes he made from the default settings. After a few minutes, the tone sounds again. If he opens Gmail he gets the tone again for every email he's received over that day. Now, here's the thing. It doesn't matter if he ignores the notification, opens and reads it, swipes the text notification away, turns the phone off and on again.....or anything else. It keeps repeating for each email that day. Obviously we looked at the settings for Gmail and the accessibility settings on the phone to ensure that repeat notifications were off, and checked by comparing my settings with his. I get a single notification for each email only. We even added the app to the 'never sleep' bit of the battery options, but it still continues.
Please can someone out there suggest a cure for this?
PLEASE!!!!!!!?
We've searched the internet for a solution and found nothing like it.....most problems seem to arrise from lack of notifications, not too many.
Thankyou.

 

[mustang7757]

Hi , see if notifications reminder is on ?

 

[B. Diddy]

Welcome to Android Central! Does he have any power-saving modes turned on, or is Battery Optimization turned on for Gmail in the system settings? Try turning off all battery saving features as it relates to Gmail, because it sounds like the app is being kept asleep until it's manually opened.

Also, does he only get emails from his Gmail account on the Gmail app, or does he have other email accounts associated with his Gmail app? And does he also have any email set up in the stock Samsung Email app?

 

[Jenny Eldershaw1]

Hi. Thanks for getting back to me.
Turning notification reminder off was one of the things I thought of, but it was off anyway! I've followed your further suggestions and will let you know what happens.