DrawDebugString display wrong position in PIE when changed display scale

void AHUD::DrawDebugTextList()
{
    // ...
    // don't draw text behind the camera
    if ( ((WorldTextLoc - CameraLoc) | CameraRot.Vector()) > 0.f )
    {

        // Project with DebugCanvas
//      FVector ScreenLoc = Canvas->Project(WorldTextLoc);
        FVector ScreenLoc = DebugCanvas->Project(WorldTextLoc);

        TextItem.SetColor( DebugTextList[Idx].TextColor );
        TextItem.Text = FText::FromString( DebugTextList[Idx].DebugText );
        TextItem.Scale = FVector2D( DebugTextList[Idx].FontScale, DebugTextList[Idx].FontScale);
        DebugCanvas->DrawItem( TextItem, FVector2D( FMath::CeilToFloat(ScreenLoc.X), FMath::CeilToFloat(ScreenLoc.Y) ) );
    }
    // ...
}