My units won't stay synced

My units will not stay synced when I try to play Bluetooth from my phone to either my Up2srtream HD or my A30. The units will not stay synced together.

Bluetooth works if I connect to either unit. The problem is when I try to use both. The unit I am not connected to drops out or looses sync.

The Up2stream is wired. The A30 is on Wifi and the app says the connection is 100%. My Wifi is Eero mesh routers and all of my devices work. Example: I can stream Netflix to my phone from the same location as the A30.

Up2stream HD Firmware: 4.6.414645.35
A30 Firmware: 4.6.415145.35

I have tried Restore Factory settings on both units multiple times. I have uninstalled and reinstalled the app (Android).

I do not know what else to try. Please help.