On Oreo (8.1.0) not getting the correct Wifi SSID. It's showing <unknown ssid> though it is connected to a wifi with SSID

I need to check the current connected wifi SSID on android. I checked with Nokia 6 and OnePlus 5 with respectively Oreo 8.1.0 and Oreo 8.0. Other phones with different OS version is working fine with this code. Is there anything wrong with my code?

private WifiInfo wifiInfo;
private String ssid = "";
private WifiManager wifiManager;

private boolean getWifiStatus() {
    wifiManager= (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    wifiInfo = wifiManager.getConnectionInfo();
    ssid = "";
    ssid = wifiInfo.getSSID();
    ConnectivityManager cm =
            (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    boolean isWiFi = false;
    if(activeNetwork != null){
        isWiFi = activeNetwork.getType() == ConnectivityManager.TYPE_WIFI;
    }

    Log.d(TAG, "getWifiStatus: " + ssid);
    if(ssid.contains("TripleMZim") && wifiManager.isWifiEnabled() && isWiFi ){
        return true;
    }
    else{
        return false;
    }
}

permission in Manifest file:

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>

Oreo 8.1+ devices require the coarse location runtime permission as well as location services to be turned on before being able to retrieve the connected SSID as it can infer the users location.

Further information is available here

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