Updating Player Settings with code

Hi everyone! I have a trouble with updatings player settings with my editor script. I have 4 versions of my game with different settings (Android free, android paid, iOS free, iOS paid) All versions have different Product names, bundle ids and icons. The problem is that when I update icons with my code and try to build a game, the icons appear to be unassigned, even though all icons are correclty set in editor after script execution.

Here's the code that changes the icons:

 static void SetApplicationIcon(BuildTargetGroup platform, bool isPaid)
     {
         Texture2D[] iconSet;
         int[] num ;
         if (platform == BuildTargetGroup.Android) {
             iconSet = new Texture2D[5];
             num = new int[] {144, 96, 72, 48, 36};
 
         } else if (platform == BuildTargetGroup.iPhone) {
             iconSet = new Texture2D[7];
             num = new int[] {152, 144, 120, 114, 76, 72, 57};
             
         } else {
             Debug.LogError("Switch to ANDROID or IOS platform");
             return;
         }
 
         for (int i = 0; i < num.Length; i++) {
             int n = num[i];
             if (isPaid) {
                 Texture2D icon = new Texture2D(n, n);
                 icon.LoadImage(File.ReadAllBytes(Application.dataPath + "/Icon/Icon_" + n.ToString() + ".png"));
                 iconSet[i] = icon;
             } else {
                 Texture2D icon = new Texture2D(n, n);
                 icon.LoadImage(File.ReadAllBytes(Application.dataPath + "/Icon/Free/Icon_" + n.ToString() + ".png"));
                 iconSet[i] = icon;
             }
         }
         PlayerSettings.SetIconsForTargetGroup(platform, iconSet); 
     }
 

I've found out that when I press "Build" button and then cancel it right away, the icons are already unassigned in Player settings.

If I set icons with mouse by drag'n'dropping, then the icons are set properly.

How to tell Editor to remember the icons? Thanks in advance!