I've got a type check WARNING

Hi all!

I've got a type check warning. I tried to add "as xxx" (Array, Float and so on...) to no avail.
What's missing here?

It's about ANT+ radar data gathering. Works fine - but throws the warnings...

INITIALIZE:

bikeRadar = new AntPlus.BikeRadar(null);

ON COMPUTE:

            var radarInfo = bikeRadar.getRadarInfo();

            if (radarInfo != null) {
                System.println("RadarInfo: ok!");
                isRadar = true;                
                myRadarSpeed1 = radarInfo[0].speed;
                myRadarThreat1 = radarInfo[0].threat;
            }    

            var batObj = bikeRadar.getBatteryStatus(null);
            if ( batObj != null ) {
                myRadarBattery = batObj.batteryStatus; 
                System.println(myRadarBattery);
            }

Row 6 and 7 throw a WARNING (radarInfo[0].speed and .threat) :

WARNING: edge1050: C:\Garmin_IQ_Projekte\Edge1_Ebike_Beta\source\EdgeAllinOne1View.mc:1187,16: Cannot determine if container access is using container type.
WARNING: edge1050: C:\Garmin_IQ_Projekte\Edge1_Ebike_Beta\source\EdgeAllinOne1View.mc:1188,16: Cannot determine if container access is using container type.

What is missing here?

Thank you!