I don’t know why, but I have gotten it to work successfully twice since all this started.
-I also had a BLE HR monitor connected. It seemed like the trainer would connect, then disconnect while waiting for the HR monitor. I removed the HR monitor (and dropped all other BLE connections to be safe), and that seemed to allow the trainer to connect, and remain connected.
I’ve since reconnected the HR monitor. At first I got the no signal issue. I then closed the zwift companion app, and restarted it, and the connections were all good.
I’m guessing, but it seems like there is some sort of prioritization of signals, and the HR monitor was pushing the trainer off the list, but only in the pairing screen. If I’m already in the game, the new connections hold.
This has only worked twice, so we’ll see if it keeps working.