GetLayerSelected is not working

Hello all, can anyone help me?

AIAPI AIErr(* GetLayerSelected )(AILayerHandle layer, AIBoolean *selected)
Always returns false regardless of whether the layer is selected or not. 

App version: 2022

Download version: v4 - Jul 2022

Here is my sample code
ai::int32 countLayer;
sAILayer->CountLayers(&countLayer);
AILayerHandle layer;
AIBoolean selected;
for (ai::int32 n = 0; n < countLayer; ++n){
    sAILayer->GetNthLayer(n, &layer);
    sAILayer->GetLayerSelected(layer, &selected);
}