diff --git a/spx-gui/src/components/asset/library/AssetLibraryModal.vue b/spx-gui/src/components/asset/library/AssetLibraryModal.vue
index 754ac8d8e..e30d5c9ab 100644
--- a/spx-gui/src/components/asset/library/AssetLibraryModal.vue
+++ b/spx-gui/src/components/asset/library/AssetLibraryModal.vue
@@ -107,7 +107,7 @@ import {
   UIDivider
 } from '@/components/ui'
 import { listAsset, AssetType, type AssetData, IsPublic } from '@/apis/asset'
-import { debounce } from '@/utils/utils'
+import { debounce } from 'lodash'
 import { useMessageHandle, useQuery } from '@/utils/exception'
 import { type Category, categories as categoriesWithoutAll, categoryAll } from './category'
 import { type Project } from '@/models/project'
diff --git a/spx-gui/src/components/editor/panels/sprite/config/SpriteBasicConfig.vue b/spx-gui/src/components/editor/panels/sprite/config/SpriteBasicConfig.vue
index a9ecdaee8..c01506228 100644
--- a/spx-gui/src/components/editor/panels/sprite/config/SpriteBasicConfig.vue
+++ b/spx-gui/src/components/editor/panels/sprite/config/SpriteBasicConfig.vue
@@ -126,7 +126,8 @@ import {
   UIButtonGroupItem
 } from '@/components/ui'
 import { useMessageHandle } from '@/utils/exception'
-import { debounce, round } from '@/utils/utils'
+import { round } from '@/utils/utils'
+import { debounce } from 'lodash'
 import {
   RotationStyle,
   LeftRight,
diff --git a/spx-gui/src/components/editor/stage/widget/detail/MonitorDetail.vue b/spx-gui/src/components/editor/stage/widget/detail/MonitorDetail.vue
index 9d6ba8017..143ac6a15 100644
--- a/spx-gui/src/components/editor/stage/widget/detail/MonitorDetail.vue
+++ b/spx-gui/src/components/editor/stage/widget/detail/MonitorDetail.vue
@@ -67,7 +67,8 @@ import {
   UIButtonGroupItem,
   UIIcon
 } from '@/components/ui'
-import { debounce, round } from '@/utils/utils'
+import { round } from '@/utils/utils'
+import { debounce } from 'lodash'
 import { useMessageHandle } from '@/utils/exception'
 import type { Monitor } from '@/models/widget/monitor'
 import { useEditorCtx } from '@/components/editor/EditorContextProvider.vue'
diff --git a/spx-gui/src/components/ui/form/UIFormItem.vue b/spx-gui/src/components/ui/form/UIFormItem.vue
index 77b3b1c5a..bde4ef013 100644
--- a/spx-gui/src/components/ui/form/UIFormItem.vue
+++ b/spx-gui/src/components/ui/form/UIFormItem.vue
@@ -20,7 +20,7 @@
 <script setup lang="ts">
 import { useSlots, computed } from 'vue'
 import { NFormItem } from 'naive-ui'
-import { debounce } from '@/utils/utils'
+import { debounce } from 'lodash'
 import UIFormItemInternal from './UIFormItemInternal.vue'
 import { useForm } from './UIForm.vue'
 
diff --git a/spx-gui/src/models/project/index.test.ts b/spx-gui/src/models/project/index.test.ts
index fe3d66993..19034b87d 100644
--- a/spx-gui/src/models/project/index.test.ts
+++ b/spx-gui/src/models/project/index.test.ts
@@ -167,6 +167,7 @@ describe('ProjectAutoSave', () => {
     await flushPromises()
     await vi.advanceTimersByTimeAsync(1000) // wait for changes to be picked up
     await flushPromises()
+    expect(project.autoSaveToCloudState).toBe(AutoSaveToCloudState.Pending)
     expect(project.hasUnsyncedChanges).toBe(true)
 
     await vi.advanceTimersByTimeAsync(1500) // wait for auto-save to trigger
@@ -180,6 +181,7 @@ describe('ProjectAutoSave', () => {
     await flushPromises()
     await vi.advanceTimersByTimeAsync(1000) // wait for changes to be picked up
     await flushPromises()
+    expect(project.autoSaveToCloudState).toBe(AutoSaveToCloudState.Failed)
     expect(project.hasUnsyncedChanges).toBe(false)
 
     await vi.advanceTimersByTimeAsync(5000) // wait for auto-retry to trigger
@@ -190,4 +192,52 @@ describe('ProjectAutoSave', () => {
     expect(localSaveMock).toHaveBeenCalledTimes(1)
     expect(localClearMock).toHaveBeenCalledTimes(1)
   })
+
+  it('should cancel pending auto-save-to-cloud when project is disposed', async () => {
+    const project = makeProject()
+
+    const cloudSaveMock = vi.spyOn(cloudHelper, 'save').mockRejectedValue(undefined)
+
+    await project.startEditing('localCacheKey')
+    project.setAutoSaveMode(AutoSaveMode.Cloud)
+
+    const newSprite = new Sprite('newSprite')
+    project.addSprite(newSprite)
+    await flushPromises()
+    await vi.advanceTimersByTimeAsync(1000) // wait for changes to be picked up
+    await flushPromises()
+    expect(project.autoSaveToCloudState).toBe(AutoSaveToCloudState.Pending)
+    expect(project.hasUnsyncedChanges).toBe(true)
+
+    project.dispose()
+
+    await vi.advanceTimersByTimeAsync(1500 * 2) // wait longer to ensure auto-save does not trigger
+    await flushPromises()
+    expect(project.autoSaveToCloudState).toBe(AutoSaveToCloudState.Pending)
+    expect(project.hasUnsyncedChanges).toBe(true)
+    expect(cloudSaveMock).toHaveBeenCalledTimes(0)
+  })
+
+  it('should cancel pending auto-save-to-local-cache when project is disposed', async () => {
+    const project = makeProject()
+
+    const localSaveMock = vi.spyOn(localHelper, 'save').mockResolvedValue(undefined)
+
+    await project.startEditing('localCacheKey')
+    project.setAutoSaveMode(AutoSaveMode.LocalCache)
+
+    const newSprite = new Sprite('newSprite')
+    project.addSprite(newSprite)
+    await flushPromises()
+    await vi.advanceTimersByTimeAsync(1000) // wait for changes to be picked up
+    await flushPromises()
+    expect(project.hasUnsyncedChanges).toBe(true)
+
+    project.dispose()
+
+    await vi.advanceTimersByTimeAsync(1000 * 2) // wait longer to ensure auto-save does not trigger
+    await flushPromises()
+    expect(project.hasUnsyncedChanges).toBe(true)
+    expect(localSaveMock).toHaveBeenCalledTimes(0)
+  })
 })
diff --git a/spx-gui/src/models/project/index.ts b/spx-gui/src/models/project/index.ts
index c3b442a95..730401c85 100644
--- a/spx-gui/src/models/project/index.ts
+++ b/spx-gui/src/models/project/index.ts
@@ -6,7 +6,7 @@
 import { reactive, watch } from 'vue'
 
 import { join } from '@/utils/path'
-import { debounce } from '@/utils/utils'
+import { debounce } from 'lodash'
 import { Disposable } from '@/utils/disposable'
 import { IsPublic, type ProjectData } from '@/apis/project'
 import { toConfig, type Files, fromConfig } from '../common/file'
@@ -432,7 +432,7 @@ export class Project extends Disposable {
           this.autoSaveToCloudState = AutoSaveToCloudState.Saved
         } catch (e) {
           this.autoSaveToCloudState = AutoSaveToCloudState.Failed
-          startRetry()
+          retryAutoSave()
           await this.saveToLocalCache(localCacheKey) // prevent data loss
           console.error('failed to auto save to cloud', e)
           return
@@ -441,25 +441,21 @@ export class Project extends Disposable {
         if (this.hasUnsyncedChanges) autoSaveToCloud()
         else await localHelper.clear(localCacheKey)
       }, 1500)
+      this.addDisposer(save.cancel)
 
-      let retryTimeoutId: ReturnType<typeof setTimeout>
-      const startRetry = () => {
-        stopRetry()
-        retryTimeoutId = setTimeout(async () => {
-          if (this.autoSaveToCloudState !== AutoSaveToCloudState.Failed) return
-          if (this.hasUnsyncedChanges) {
-            autoSaveToCloud()
-          } else {
-            this.autoSaveToCloudState = AutoSaveToCloudState.Saved
-            await localHelper.clear(localCacheKey)
-          }
-        }, 5000)
-      }
-      const stopRetry = () => clearTimeout(retryTimeoutId)
-      this.addDisposer(stopRetry)
+      const retryAutoSave = debounce(async () => {
+        if (this.autoSaveToCloudState !== AutoSaveToCloudState.Failed) return
+        if (this.hasUnsyncedChanges) {
+          autoSaveToCloud()
+        } else {
+          this.autoSaveToCloudState = AutoSaveToCloudState.Saved
+          await localHelper.clear(localCacheKey)
+        }
+      }, 5000)
+      this.addDisposer(retryAutoSave.cancel)
 
       return () => {
-        stopRetry()
+        retryAutoSave.cancel()
         if (this.autoSaveToCloudState !== AutoSaveToCloudState.Saving)
           this.autoSaveToCloudState = AutoSaveToCloudState.Pending
         if (this.autoSaveMode === AutoSaveMode.Cloud) save()
@@ -483,12 +479,14 @@ export class Project extends Disposable {
     // watch for all changes, auto save to local cache, or touch all game files to trigger lazy loading to ensure they are in memory
     const autoSaveToLocalCache = (() => {
       const save = debounce(() => this.saveToLocalCache(localCacheKey), 1000)
+      this.addDisposer(save.cancel)
 
       const delazyLoadGameFiles = debounce(() => {
         const files = this.exportGameFiles()
         const fileList = Object.keys(files)
         fileList.map((path) => files[path]!.arrayBuffer())
       }, 1000)
+      this.addDisposer(delazyLoadGameFiles.cancel)
 
       return () => {
         if (this.autoSaveMode === AutoSaveMode.LocalCache) save()
diff --git a/spx-gui/src/utils/utils.ts b/spx-gui/src/utils/utils.ts
index eb0df9d9c..7c7c015ac 100644
--- a/spx-gui/src/utils/utils.ts
+++ b/spx-gui/src/utils/utils.ts
@@ -13,17 +13,6 @@ export const isSound = (url: string): boolean => {
   return ['wav', 'mp3', 'ogg'].includes(extension)
 }
 
-export function debounce<T extends (...args: any[]) => any>(func: T, delay: number = 300) {
-  let timeoutId: ReturnType<typeof setTimeout>
-  return function (this: ThisParameterType<T>, ...args: Parameters<T>) {
-    const context = this
-    clearTimeout(timeoutId)
-    timeoutId = setTimeout(() => {
-      func.apply(context, args)
-    }, delay)
-  }
-}
-
 /**
  * If add-to-public-library features are enabled.
  * In release v1.3, we do not allow users to add asset to public library (the corresponding features are disabled).