Just upgraded from a nexus 6p, which worked fine...maybe an Oreo problem? I've confirmed this on 2 Plantronics backbeat pros and the new Sony 1000xm2's... My Nexus 6p still works fine
Followup... Restarted pixel and works again... Sorry... Will post again if this problem resurfaces
It's a Android 8.0 Oreo issue
Re: Pixel User Community https://productforums.google.com/forum/#!msg/phone-by-google/iJeDphsoOJ4...
Re Fix: Android Police
http://www.androidpolice.com/2017/02/24/many-users-experiencing-random-b...
Sometimes rebooting your device can resolve some of the issues you're experiencing