Android Nougat all notification sounds are disabled?

[AC Question]

I got Nexus 5x running Nougat 7.0. Somehow all my notification sounds are not playing. Not for Facebook Messenger app not for my Calls. Even when i try to change my ringtone it dont play any sound while in choosing screen. YouTube and Facebook videos are NOT working.

Ringer volume is at 100%
DND is OFF
Push Notifications for Apps are normal