Volume of whole Mac OS reduced automatically after pluin / plug out headphone during WebRTC call Reproduce steps: 1. Goto WebRTC example site: appr.tc 2. Start a WebRTC meeting 3. Other device join the meeting and make sure both side can hear / see each other. 4. Make sure the system audio volume is max. 5. Plug in headphone 6. Plug out headphone Actual behavior: After step 6. The volume is reduced a lot and user can hardly hear other side. Expected behavior: The volume should not be affected after step 6. Mac OS: High Sierra. 10.13.6 Safari: Version 12.0 (13606.2.11)
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