Device dependency
BLE and Remote ID depend strongly on the phone
Live groups and drone Remote ID are optional radio features. Reliability depends not only on the app, but also on hardware, Android version, vendor changes, permissions, battery saving rules and the radio environment.
Phone and Android
Some devices support BLE scanning, BLE extended advertising, Wi-Fi Aware/NAN or Wi-Fi beacon parsing only partially or not at all. Drone Remote ID data may therefore be missing even when a drone is broadcasting.
Permissions and system limits
Bluetooth, Nearby devices, location, Wi-Fi and visible foreground services may be required depending on the function. Some vendors heavily throttle BLE in the background, during battery saving or with the screen locked.
Environment and signal source
Range and detection depend on distance, obstacles, interference, active Bluetooth/Wi-Fi, region and whether the drone actually broadcasts compatible Remote ID signals.