I have android BLE application for connecting to NRF52833 BLE GATT server.
Everything works fine except first connection after android device restart.

Device.connectGatt returns true, but there is no mGattCallback event.

If I do adapter.startLeScan (for 300ms) and adapter.stopLeScan, next connection to GATT server works, also with correct mGattCallback;

Now I have writed “try connect, delay 2s,if wasn’t GattCallback->startLeScan+stopLeScan and connectGatt” procedure, but I want to know correct solution for this problem.