4/28/2020: Life Fitness Discover SE3HD and Cybex 70T consoles equipped with Gym Kit do not currently support multiple BLE connections. The first BLE compatible devices (such as an Apple Watch, a heart rate strap, or a bluetooth phone) connects to the console, and will block any others from connecting until they are disconnected.
Note: Bluetooth Headphones can be connected along with multiple bluetooth headphone connections through Bluetooth Classic.