diff --git a/jsbridge/src/main/java/com/apkfuns/jsbridge/JBArgumentParser.java b/jsbridge/src/main/java/com/apkfuns/jsbridge/JBArgumentParser.java
index 97d6873..065f3da 100644
--- a/jsbridge/src/main/java/com/apkfuns/jsbridge/JBArgumentParser.java
+++ b/jsbridge/src/main/java/com/apkfuns/jsbridge/JBArgumentParser.java
@@ -118,13 +118,17 @@ public void setValue(String value) {
     @NonNull
     static JBArgumentParser parse(@Nullable String jsonString) {
         JBArgumentParser parser = new JBArgumentParser();
-        if(TextUtils.isEmpty(jsonString) || (!jsonString.startsWith("{") &&
-                !jsonString.startsWith("["))) {
+        // Issue #25: trim before the startsWith check so a leading
+        // whitespace or BOM coming through the prompt channel does
+        // not look like a malformed payload.
+        String trimmed = jsonString == null ? null : jsonString.trim();
+        if(TextUtils.isEmpty(trimmed) || (!trimmed.startsWith("{") &&
+                !trimmed.startsWith("["))) {
             parser.setThrowable(new JSONException("Argument error: " + jsonString));
             return parser;
         }
         try {
-            JSONObject jsonObject = new JSONObject(jsonString);
+            JSONObject jsonObject = new JSONObject(trimmed);
             parser.setId(jsonObject.optLong("id"));
             parser.setMethod(jsonObject.optString("method"));
             parser.setModule(jsonObject.optString("module"));
diff --git a/jsbridge/src/main/java/com/apkfuns/jsbridge/JsBridgeImpl.java b/jsbridge/src/main/java/com/apkfuns/jsbridge/JsBridgeImpl.java
index a4792b1..4a45402 100644
--- a/jsbridge/src/main/java/com/apkfuns/jsbridge/JsBridgeImpl.java
+++ b/jsbridge/src/main/java/com/apkfuns/jsbridge/JsBridgeImpl.java
@@ -273,10 +273,25 @@ private boolean onCallJsPrompt(String methodArgs, Object result) {
         if (argumentParser.isSuccess() && !TextUtils.isEmpty(argumentParser.getModule())
                 && !TextUtils.isEmpty(argumentParser.getMethod())) {
             JsModule findModule = getModule(argumentParser.getModule());
-            if (findModule != null) {
-                HashMap<String, JsMethod> methodHashMap = exposedMethods.get(findModule);
-                if (methodHashMap != null && !methodHashMap.isEmpty() && methodHashMap.containsKey(
-                        argumentParser.getMethod())) {
+            // Issue #25: report routing failures with the actual cause
+            // instead of a generic "JBArgument Parse error" which makes
+            // every developer think their JSON is malformed.
+            if (findModule == null) {
+                String msg = "Module not found: " + argumentParser.getModule();
+                JBLog.e(msg, null);
+                setJsPromptResult(result, false, msg);
+                return true;
+            }
+            HashMap<String, JsMethod> methodHashMap = exposedMethods.get(findModule);
+            if (methodHashMap == null || methodHashMap.isEmpty()
+                    || !methodHashMap.containsKey(argumentParser.getMethod())) {
+                String msg = "Method not found: " + argumentParser.getModule()
+                        + "." + argumentParser.getMethod();
+                JBLog.e(msg, null);
+                setJsPromptResult(result, false, msg);
+                return true;
+            }
+            if (true) {
                     JsMethod method = methodHashMap.get(argumentParser.getMethod());
                     List<JBArgumentParser.Parameter> parameters = argumentParser.getParameters();
                     int length = method.getParameterType().size();
@@ -327,9 +342,6 @@ private boolean onCallJsPrompt(String methodArgs, Object result) {
                     }
                     return true;
                 }
-            }
-            setJsPromptResult(result, false, "JBArgument Parse error");
-            return true;
         }
         JBLog.e("JBArgument error", argumentParser.getThrowable());
         setJsPromptResult(result, false, argumentParser.getErrorMsg());