I have a new Samsung A21s and it's been fine, except when I make a transaction using my monzo bank account. It's set to notify me of a transaction, but my phone now beeps every second after I use my card. I have tried closing all apps, opening the app and closing it again, but nothing seems to work. It's a media sound rather than a notification sound (when I adjust the volume to make it stop, it only works if I turn the media volume to mute, not if i turn the notification volume to mute). I've checked all of the monzo app settings and they're the same as they were on my old samsung phone and the same as my partners settings on his android phone, so I think it's a phone issue rather than an app issue.... The only thing that stops it is to restart my phone, but I can't rely on doing that every time I use my bank card....!