I also have similar troubles with Bridge. Phones have fixed IP (described in roter). Samsung S4 (KitKat) works more or less normal (75-80% attempts to run are successful). XIOMI Redmi 4A (Android 7) - 50-60% successful. OnePlus 5t (Android) - 25% maximum. Typically B4A (7.80) writes about success, unlike it's not so. Enough often IDE looses phones, unlike Bridge shows IP and ready status. It seems to me that troubles are mostly relative to phone models. If something wrong, why IDE do not repeat attempts ? I need to repeat Shift-F2 , F2, F5 (compile !) some times until my app will start.