diff --git a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
index 188bd09878..ddb3e90687 100644
--- a/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
+++ b/maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/IPhoneBuilder.java
@@ -3185,32 +3185,65 @@ private String buildLocalizedIconSelectorObjC() {
             mapping.append("@\"").append(entry.getValue()).append("\": @\"").append(entry.getKey()).append("\"");
         }
         mapping.append(" }");
+        // Wait for UIApplicationDidBecomeActiveNotification before calling
+        // -[UIApplication setAlternateIconName:]. Calling from didFinishLaunching --
+        // even via dispatch_async on the main queue -- routinely fails with
+        // NSCocoaErrorDomain Code=3072 ("operation was cancelled") because the
+        // system alert iOS shows for an icon change has no active foreground scene
+        // to anchor to yet. Deferring to the active state fixes the silent failure
+        // that the user reported on top of #4870. The completion handler is wired
+        // up so any remaining bundle-configuration problem surfaces in the device
+        // log instead of being swallowed (the original nil handler hid this).
         return "\n    // Codename One localized app icon selection\n"
                 + "    if ([[UIApplication sharedApplication] respondsToSelector:@selector(setAlternateIconName:completionHandler:)]) {\n"
                 + "        NSDictionary *cn1LocalizedIcons =\n"
                 + mapping + ";\n"
-                + "        NSString *cn1CurrentIcon = [[UIApplication sharedApplication] alternateIconName];\n"
-                + "        NSString *cn1TargetIcon = nil;\n"
-                + "        NSArray *cn1PrefLangs = [NSLocale preferredLanguages];\n"
-                + "        if (cn1PrefLangs.count > 0) {\n"
-                + "            NSString *cn1PrefLang = [cn1PrefLangs objectAtIndex:0];\n"
-                + "            NSArray *cn1LangParts = [cn1PrefLang componentsSeparatedByCharactersInSet:\n"
-                + "                [NSCharacterSet characterSetWithCharactersInString:@\"-_\"]];\n"
-                + "            if (cn1LangParts.count >= 2) {\n"
-                + "                NSString *cn1Key = [NSString stringWithFormat:@\"%@_%@\",\n"
-                + "                    [[cn1LangParts objectAtIndex:0] lowercaseString],\n"
-                + "                    [[cn1LangParts objectAtIndex:1] uppercaseString]];\n"
-                + "                cn1TargetIcon = [cn1LocalizedIcons objectForKey:cn1Key];\n"
+                + "        void (^cn1ApplyIcon)(void) = ^{\n"
+                + "            NSString *cn1CurrentIcon = [[UIApplication sharedApplication] alternateIconName];\n"
+                + "            NSString *cn1TargetIcon = nil;\n"
+                + "            NSArray *cn1PrefLangs = [NSLocale preferredLanguages];\n"
+                + "            if (cn1PrefLangs.count > 0) {\n"
+                + "                NSString *cn1PrefLang = [cn1PrefLangs objectAtIndex:0];\n"
+                + "                NSArray *cn1LangParts = [cn1PrefLang componentsSeparatedByCharactersInSet:\n"
+                + "                    [NSCharacterSet characterSetWithCharactersInString:@\"-_\"]];\n"
+                + "                if (cn1LangParts.count >= 2) {\n"
+                + "                    NSString *cn1Key = [NSString stringWithFormat:@\"%@_%@\",\n"
+                + "                        [[cn1LangParts objectAtIndex:0] lowercaseString],\n"
+                + "                        [[cn1LangParts objectAtIndex:1] uppercaseString]];\n"
+                + "                    cn1TargetIcon = [cn1LocalizedIcons objectForKey:cn1Key];\n"
+                + "                }\n"
+                + "                if (cn1TargetIcon == nil && cn1LangParts.count >= 1) {\n"
+                + "                    NSString *cn1Key = [[cn1LangParts objectAtIndex:0] lowercaseString];\n"
+                + "                    cn1TargetIcon = [cn1LocalizedIcons objectForKey:cn1Key];\n"
+                + "                }\n"
                 + "            }\n"
-                + "            if (cn1TargetIcon == nil && cn1LangParts.count >= 1) {\n"
-                + "                NSString *cn1Key = [[cn1LangParts objectAtIndex:0] lowercaseString];\n"
-                + "                cn1TargetIcon = [cn1LocalizedIcons objectForKey:cn1Key];\n"
+                + "            BOOL cn1NeedsUpdate = (cn1TargetIcon == nil && cn1CurrentIcon != nil)\n"
+                + "                || (cn1TargetIcon != nil && ![cn1TargetIcon isEqualToString:cn1CurrentIcon]);\n"
+                + "            if (!cn1NeedsUpdate) {\n"
+                + "                return;\n"
                 + "            }\n"
-                + "        }\n"
-                + "        BOOL cn1NeedsUpdate = (cn1TargetIcon == nil && cn1CurrentIcon != nil)\n"
-                + "            || (cn1TargetIcon != nil && ![cn1TargetIcon isEqualToString:cn1CurrentIcon]);\n"
-                + "        if (cn1NeedsUpdate) {\n"
-                + "            [[UIApplication sharedApplication] setAlternateIconName:cn1TargetIcon completionHandler:nil];\n"
+                + "            NSString *cn1FinalTarget = cn1TargetIcon;\n"
+                + "            [[UIApplication sharedApplication] setAlternateIconName:cn1FinalTarget completionHandler:^(NSError * _Nullable cn1IconErr) {\n"
+                + "                if (cn1IconErr != nil) {\n"
+                + "                    NSLog(@\"[CodenameOne] Failed to set alternate app icon '%@': %@\", cn1FinalTarget ?: @\"(primary)\", cn1IconErr);\n"
+                + "                } else {\n"
+                + "                    NSLog(@\"[CodenameOne] Set alternate app icon to '%@'\", cn1FinalTarget ?: @\"(primary)\");\n"
+                + "                }\n"
+                + "            }];\n"
+                + "        };\n"
+                + "        if ([UIApplication sharedApplication].applicationState == UIApplicationStateActive) {\n"
+                + "            dispatch_async(dispatch_get_main_queue(), cn1ApplyIcon);\n"
+                + "        } else {\n"
+                + "            __block id cn1ActiveObs = nil;\n"
+                + "            cn1ActiveObs = [[NSNotificationCenter defaultCenter]\n"
+                + "                addObserverForName:UIApplicationDidBecomeActiveNotification object:nil queue:[NSOperationQueue mainQueue]\n"
+                + "                usingBlock:^(NSNotification *cn1Note) {\n"
+                + "                    if (cn1ActiveObs != nil) {\n"
+                + "                        [[NSNotificationCenter defaultCenter] removeObserver:cn1ActiveObs];\n"
+                + "                        cn1ActiveObs = nil;\n"
+                + "                    }\n"
+                + "                    cn1ApplyIcon();\n"
+                + "                }];\n"
                 + "        }\n"
                 + "    }\n";
     }