Why did my htc one a9 stop ringing after system update?

[AC Question]

I installed the update and ever since my htc does not ring anymore. All the other sounds work fine. It is not on silent. I also checked the volume settings. Could you help? Thank you

 

[megatomic]

Did you check to make sure that there is a ringtone assigned to this event? I have had that happen on a CM update to another phone so this is a remote possibility.