Fix: Use fresh super properties from SDK instead of stale static cache

android/src/main/java/com/mixpanel/reactnative/AutomaticProperties.java

@@ -1,5 +1,6 @@
 package com.mixpanel.reactnative;
 
+import com.mixpanel.android.mpmetrics.MixpanelAPI;
 import org.json.JSONException;
 import org.json.JSONObject;
 
@@ -16,18 +17,27 @@ public static void setAutomaticProperties(JSONObject properties) {
     }
 
     /**
-     * This method will append library properties to the default properties.
+     * This method will append fresh super properties to the given properties object.
+     * Instead of using a stale static cache, it fetches super properties directly from the Android SDK
+     * to ensure updated values are used.
+     * 
+     * @param instance The MixpanelAPI instance to get fresh super properties from
+     * @param properties The properties object to append to. If null, a new JSONObject will be created
+     *                   (note: the caller's reference will not be updated; use the return value if needed)
+     * @throws JSONException If there's an error merging properties
      */
-    public static void appendLibraryProperties(JSONObject properties) throws JSONException {
-        if (properties == null) {
-            properties = new JSONObject();
-        }
-
-        if (sAutomaticProperties != null) {
-            // merge automatic properties
-            for (Iterator<String> keys = sAutomaticProperties.keys(); keys.hasNext();) {
-                String key = keys.next();
-                properties.put(key, sAutomaticProperties.get(key));
+    public static void appendLibraryProperties(MixpanelAPI instance, JSONObject properties) throws JSONException {
+        // Get fresh super properties from the Android SDK (not from stale static cache)
+        if (instance != null) {
+            if (properties == null) {
+                properties = new JSONObject();
+            }
+            JSONObject superProperties = instance.getSuperProperties();
+            if (superProperties != null) {
+                for (Iterator<String> keys = superProperties.keys(); keys.hasNext();) {
+                    String key = keys.next();
+                    properties.put(key, superProperties.get(key));
+                }
             }
         }
     }

android/src/main/java/com/mixpanel/reactnative/MixpanelReactNativeModule.java

@@ -31,7 +31,6 @@ public String getName() {
         return "MixpanelReactNative";
     }
 
-
     @ReactMethod
     public void initialize(String token, boolean trackAutomaticEvents, boolean optOutTrackingDefault, ReadableMap metadata, String serverURL, boolean useGzipCompression, Promise promise) throws JSONException {
         JSONObject mixpanelProperties = ReactNativeHelper.reactToJSON(metadata);
@@ -181,7 +180,7 @@ public void track(final String token, final String eventName, ReadableMap proper
         }
         synchronized (instance) {
             JSONObject eventProperties = ReactNativeHelper.reactToJSON(properties);
-            AutomaticProperties.appendLibraryProperties(eventProperties);
+            AutomaticProperties.appendLibraryProperties(instance, eventProperties);
             instance.track(eventName, eventProperties);
             promise.resolve(null);
         }
@@ -340,7 +339,7 @@ public void set(final String token, ReadableMap properties, Promise promise) thr
         }
         synchronized (instance) {
             JSONObject sendProperties = ReactNativeHelper.reactToJSON(properties);
-            AutomaticProperties.appendLibraryProperties(sendProperties);
+            AutomaticProperties.appendLibraryProperties(instance, sendProperties);
             instance.getPeople().set(sendProperties);
             promise.resolve(null);
         }
@@ -368,7 +367,7 @@ public void setOnce(final String token, ReadableMap properties, Promise promise)
         }
         synchronized (instance) {
             JSONObject sendProperties = ReactNativeHelper.reactToJSON(properties);
-            AutomaticProperties.appendLibraryProperties(sendProperties);
+            AutomaticProperties.appendLibraryProperties(instance, sendProperties);
             instance.getPeople().setOnce(sendProperties);
             promise.resolve(null);
         }