So I ran into the same problem, this definitely seems like a bug to me. It happens as you say and isn’t voice stealing 
Unintended/Undocumented arp stealing? 
I made a little video showcasing the problem.
So I ran into the same problem, this definitely seems like a bug to me. It happens as you say and isn’t voice stealing Unintended/Undocumented arp stealing? I made a little video showcasing the problem.