Hello,
My new phone doesn' t connect to Garmin Edge 520. It's some kind of Garmin/Xiaomi software compatibility issue. They paired but not connect. I find the solution with older Garmin software release. So, they works with 4.22 software release, but not with the newer.I had to stop update function for Garmin aplication. It's Garmin issue because phone easilly connect with other bt devices. Garmin please do something to resolve this problem. 
