iOS 9 beta 5 (13A4325c) on an iPhone 6. Last night after taking and sending a picture by holding down the camera icon in messages the speaker completely stopped working. Nothing I could do, toggling mute switch, messing with volume, switching sources, etc.. Nothing would bring it back. No sounds would work, neither notifications or media. It was like the speaker was COMPLETELY dead. I was a bit nervous as I rebooted the phone as it really felt like a hardware problem, but thankfully a reboot fixed it. I was unable to reproduce it by sending another picture, so I'm thinking it was just a coincidence that it happened when I did that. Has anyone else hit this bug?