Have a search back in the list, it was well discussed recently. I believe it relates to using the sam id on more devices so BM anti loopback kicks in.
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From: main@DVSwitch.groups.io <main@DVSwitch.groups.io> on behalf of mark rosenberg <4x1ks.mark@...>
Sent: 29 July 2018 16:41:38
Subject: Re: [DVSwitch] connection to master server "lost"
According to Corey, he thinks the audio is saying "blocked"...so what does Blocked mean?