diff --git a/packages/redox/src/core/__tests__/reducer.test.ts b/packages/redox/src/core/__tests__/reducer.test.ts
index 25afb2c..8d21d65 100644
--- a/packages/redox/src/core/__tests__/reducer.test.ts
+++ b/packages/redox/src/core/__tests__/reducer.test.ts
@@ -98,6 +98,24 @@ describe('defineModel/reducers', () => {
   })
 
   describe('immer', () => {
+    it('should not update with do nothing', () => {
+      const count = defineModel({
+        name: 'count',
+        state: { value: 0 },
+        reducers: {
+          add(_state) {},
+        },
+      })
+
+      const store = redoxStore.getModel(count)
+
+      const $state = store.$state
+
+      store.add()
+
+      expect(store.$state).toBe($state)
+    })
+
     it('should work with a basic literal', () => {
       const count = defineModel({
         name: 'count',
diff --git a/packages/redox/src/core/model.ts b/packages/redox/src/core/model.ts
index 5f2d1fd..6972a52 100644
--- a/packages/redox/src/core/model.ts
+++ b/packages/redox/src/core/model.ts
@@ -9,7 +9,6 @@ import {
   effectScope,
   EffectScope,
   onViewInvalidate,
-  isReactive,
 } from '../reactivity'
 import { AnyModel } from './defineModel'
 import { Views, Actions, Action, State, StateObject } from './modelOptions'
@@ -216,11 +215,7 @@ export class ModelInternal<IModel extends AnyModel = AnyModel> {
       if (state === undefined)
         return reducer(state, action.payload) as IModel['state']
       return produce(
-        isReactive(this.state)
-          ? this.state
-          : isObject(this.state)
-          ? reactive(this.state)
-          : this.state,
+        isObject(state) ? reactive(state) : state,
         (draft: any) => reducer!(draft, action.payload) as IModel['state']
       )
     }
diff --git a/packages/redox/src/reactivity/__tests__/producer.test.ts b/packages/redox/src/reactivity/__tests__/producer.test.ts
index 3f4a5a2..b1c67f9 100644
--- a/packages/redox/src/reactivity/__tests__/producer.test.ts
+++ b/packages/redox/src/reactivity/__tests__/producer.test.ts
@@ -1277,6 +1277,10 @@ describe(`reactivity/producer`, () => {
               expect(child.b).toBe(2) // changed
               expect(child.c).toBe(2) // added
               expect(child.d).toBeUndefined() // deleted
+              child.f = 2
+              produce(reactive(child), (s) => {
+                console.log(s.f)
+              })
             })
           })
         })
diff --git a/packages/redox/src/reactivity/index.ts b/packages/redox/src/reactivity/index.ts
index 0d1ebb2..5d82c96 100644
--- a/packages/redox/src/reactivity/index.ts
+++ b/packages/redox/src/reactivity/index.ts
@@ -1,10 +1,4 @@
-export {
-  toReactive,
-  toReadonly,
-  reactive,
-  readonly,
-  isReactive,
-} from './reactive'
+export { toReactive, toReadonly, reactive, readonly } from './reactive'
 export { View, view, ViewGetter, onViewInvalidate } from './view'
 export { ReactiveEffect } from './effect'
 export { EffectScope, effectScope } from './effectScope'