In the Grapheneos dialer app, voicemail, when I delete a voicemail, it will after a few seconds restore it and scroll all voicemails down the screen over again, and play the notification sound. It will not let me delete any voicemail. When it reloads the deleted voicemail it shows as new with the new messages indication at (1).
Also after I tap to close a voicemail it scrolls through the list of voicemails all over and plays the notification sound again. This is very annoying. I cannot believe it was designed this way.
If I leave the voicemail open it automatically reloads the voicemails to the screen every few minutes and plays the notification sound. If I screen lock the phone with the voicemail open it plays the notification sound every few minutes.