Problem using two Android phones Bluetooth in Subaru Legacy 2016

[Old_Professor]

We just bought a Subaru Legacy with the advanced navigation package. I paired my DROID4 and my wife's LG Cosmos 3 to the phone function in the nav package in the Subaru. Only one phone at a time is connected. If the Cosmos is connected and a call comes in on the DROID, the DROID rings and I have to make multiple selections on the touch screen to disconnect the Cosmos and connect the DROID.
When I make the switch, I'm getting an error message from the Subaru that the DROID is refusing the Bluetooth connection. I have no idea how or why the Subaru thinks that the DROID4 is refusing a Bluetooth connection. How do I fix that?
Suggestions welcome.