In the past few months, ZCA has occasionally taken 15-20 minutes to switch from the ‘inactive’ home page to the ‘riding’ screen.
ZCA is on the same network as the Zwift app. Force quitting the ZCA app doesn’t help, but power-cycling the phone fixes it. Or, if I wait long enough, it fixes itself.
Fortunately, I no longer rely on ZCA for a Bluetooth bridge.