Notification ringtones don't sound

Hello, I’m using K9 mail for almost 6 years and think it’s good overall.
But after the update in some months before, not just the UI changed.
the notification ringtones don’t sound anymore when I receive mails.

Mails are still pushed real time, and all settings look alright as it looked before, I’m using this for years so I think I’m understanding the complicated part of using K9, and I looked at settings on Android itself and Doze matters, all look normal.

Anyone has met same circumstance? and how to fix it?
I’m using Xperia Z5 compact, quite old one.

Thanks!

1 Like

I found a solution.
Just uninstall and re-install K9 with exactly same settings fixed it.
there sometimes might be some phenomenon with indescribable reasons on apps, then maybe we only can use this way…