diff --git a/jerry-core/ecma/builtin-objects/ecma-builtin-reflect.c b/jerry-core/ecma/builtin-objects/ecma-builtin-reflect.c
index 95a226d0c..9758b69c3 100644
--- a/jerry-core/ecma/builtin-objects/ecma-builtin-reflect.c
+++ b/jerry-core/ecma/builtin-objects/ecma-builtin-reflect.c
@@ -179,7 +179,7 @@ ecma_builtin_reflect_dispatch_routine (uint16_t builtin_routine_id, /**< built-i
 
     ecma_object_t *target_p = ecma_get_object_from_value (arguments_list[0]);
 
-    /* 2. new_target_p is not supported for now*/
+    /* 2. */
     ecma_object_t *new_target_p = target_p;
 
     if (arguments_number > 2)
diff --git a/jerry-core/ecma/operations/ecma-function-object.c b/jerry-core/ecma/operations/ecma-function-object.c
index bf3ee1ccb..fbde56428 100644
--- a/jerry-core/ecma/operations/ecma-function-object.c
+++ b/jerry-core/ecma/operations/ecma-function-object.c
@@ -419,6 +419,8 @@ ecma_op_create_dynamic_function (const ecma_value_t *arguments_list_p, /**< argu
     if (JERRY_UNLIKELY (proto == NULL))
     {
       ecma_bytecode_deref (bytecode_data_p);
+      ecma_deref_ecma_string (arguments_str_p);
+      ecma_deref_ecma_string (function_body_str_p);
       return ECMA_VALUE_ERROR;
     }
 #endif /* ENABLED (JERRY_ES2015) */
diff --git a/tests/jerry/es2015/reflect-construct.js b/tests/jerry/es2015/reflect-construct.js
index 0baac264b..d37ee2ba1 100644
--- a/tests/jerry/es2015/reflect-construct.js
+++ b/tests/jerry/es2015/reflect-construct.js
@@ -51,8 +51,8 @@ function DogClass () {
 
 var obj1 = Reflect.construct (CatClass, args, DogClass);
 assert (obj1.name === 'Cat');
-// assert (!(ob1 instanceof CatClass)); This is true because new target is not supported yet
-// assert (obj1 instanceof DogClass); This is false because new target is not supported yet
+assert (!(obj1 instanceof CatClass));
+assert (obj1 instanceof DogClass);
 
 try {
   Reflect.construct (func1, 5, 5);
diff --git a/tests/jerry/es2015/regression-test-issue-3862.js b/tests/jerry/es2015/regression-test-issue-3862.js
new file mode 100644
index 000000000..292059a4b
--- /dev/null
+++ b/tests/jerry/es2015/regression-test-issue-3862.js
@@ -0,0 +1,29 @@
+// Copyright JS Foundation and other contributors, http://js.foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var target = function() {};
+var handler = {
+    get() {
+        if ($);
+    }
+};
+
+var o = new Proxy(target, handler);
+
+try {
+  Reflect.construct(Function, ['c'], o);
+  assert(false);  
+} catch (e) {
+  assert(e instanceof ReferenceError);
+}