Build release app cannot receive push on client with Proguard Android Kotlin

[nvmabc]

I have issue when build release app with SignalR cannot receive push data from api.
but when run debug that working fine. So how can we do with this case because my project sign Proguard build release app.

build.gradle
implementation files('libs/signalr-client-sdk.jar')
implementation files('libs/signalr-client-sdk-android.jar')

Waiting Receive Data:
hubProxy?.on("ReceiveDataPush", SubscriptionHandler1 { data: String ->
val aaaa = data
hubConnection?.stop()
hubConnection?.disconnect()
}, String::class.java)

Thanks for you help.