unsupported bluetooth

I am developing iOS Application that use bluetooth. I have to connect my iPhone with windows machine bluetooth and it is working fine but sometimes i am getting manager state "Unsupported". I am using iPhone XR. I know my iPhone XR is supported and i have connected manytimes. But why sometimes i got manager state unsupported.

I am testing on real device

func centralManagerDidUpdateState(_ manager: CBCentralManager) { 
     if manager.state == .poweredOn { } 
     else if (manager.state == .unauthorized || manager.state == .unsupported){ }
 }
unsupported bluetooth
 
 
Q