[Bug]:

### 请描述遇到的问题，以及您所期望的正确的结果

在 4层 Fragment 嵌套（Activity → HomeFragment → TypeFragment → CategoryFragment）时跳转 Flutter 页面然后返回 页面消失了4到8秒收才调用 onDestroy方法（华为mate20pro）貌似是低端机型
/**
* 针对有些特殊问题的处理 比如onUpdateSystemUiOverlays
*/
class PuFlutterBoostFragment : FlutterBoostFragment() {
companion object {
private const val TAG = "PuFlutterBoostFragmentTAG"
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
PuLog.d(TAG, "onViewCreated: ${getUrl()}")
}

override fun onDestroyView() {
PuLog.d(TAG, "onDestroyView: ${getUrl()}")
super.onDestroyView()
}

override fun onDestroy() {
PuLog.d(TAG, "onDestroy: ${getUrl()}")
super.onDestroy()
}
}，而 3层嵌套正常（略微延时）。class PuFlutterBoostActivity : FlutterFragmentActivity() {
private var pageUrl: String? = null
private var pageParams: Map? = null
private var uniqueId: String? = null
companion object{
private const val TAG = "PuFlutterBoostActivity"
}
override fun onCreate(savedInstanceState: Bundle?) {
setupStatusBar()
// 先获取参数
pageUrl = intent.getStringExtra("url")
pageParams = intent.getSerializableExtra("params") as? Map
uniqueId = intent.getStringExtra("uniqueId")
PuLog.d(TAG, "生成新的uniqueId: $uniqueId")
// 再调用父类的onCreate
super.onCreate(savedInstanceState)
}

/**
* 设置状态栏样式
*/
private fun setupStatusBar() {
window.decorView.post {
// 根据是否透明设置状态栏
PuStatusBar.setStatusBar(this, true, getColor(R.color.ai_bg_surface), translucent = false)
}
}

override fun createFlutterFragment(): FlutterFragment {
// 直接创建并返回新的Fragment实例
return FlutterBoostFragment.CachedEngineFragmentBuilder(PuFlutterBoostFragment::class.java)
.url(pageUrl ?: "default_route")
.urlParams(pageParams ?: emptyMap())
.uniqueId(uniqueId ?: "${System.currentTimeMillis()}_${pageUrl}")
.build()
}

override fun onBackPressed() {
// 从FragmentManager中获取当前的Fragment
val fragment = supportFragmentManager.findFragmentById(android.R.id.content) as? FlutterBoostFragment
if (fragment != null) {
fragment.onBackPressed()这种实现方式

### 请说明如何操作会遇到上述问题

_No response_

### 在下面填入关键复现代码

```
```

### 复现的平台

Both

### Flutter SDK版本

3.16.9

### FlutterBoost版本

5.0.0

### 是否延迟初始化FlutterBoost

No

### 解决方案

在 4层 Fragment 嵌套（Activity → HomeFragment → TypeFragment → CategoryFragment）时跳转 Flutter 页面然后返回 页面消失了4到8秒收才调用 onDestroy方法（华为mate20pro）貌似是低端机型
/**
* 针对有些特殊问题的处理 比如onUpdateSystemUiOverlays
*/
class PuFlutterBoostFragment : FlutterBoostFragment() {
companion object {
private const val TAG = "PuFlutterBoostFragmentTAG"
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
PuLog.d(TAG, "onViewCreated: ${getUrl()}")
}

override fun onDestroyView() {
PuLog.d(TAG, "onDestroyView: ${getUrl()}")
super.onDestroyView()
}

override fun onDestroy() {
PuLog.d(TAG, "onDestroy: ${getUrl()}")
super.onDestroy()
}
}，而 3层嵌套正常（略微延时）。class PuFlutterBoostActivity : FlutterFragmentActivity() {
private var pageUrl: String? = null
private var pageParams: Map? = null
private var uniqueId: String? = null
companion object{
private const val TAG = "PuFlutterBoostActivity"
}
override fun onCreate(savedInstanceState: Bundle?) {
setupStatusBar()
// 先获取参数
pageUrl = intent.getStringExtra("url")
pageParams = intent.getSerializableExtra("params") as? Map
uniqueId = intent.getStringExtra("uniqueId")
PuLog.d(TAG, "生成新的uniqueId: $uniqueId")
// 再调用父类的onCreate
super.onCreate(savedInstanceState)
}

/**
* 设置状态栏样式
*/
private fun setupStatusBar() {
window.decorView.post {
// 根据是否透明设置状态栏
PuStatusBar.setStatusBar(this, true, getColor(R.color.ai_bg_surface), translucent = false)
}
}

override fun createFlutterFragment(): FlutterFragment {
// 直接创建并返回新的Fragment实例
return FlutterBoostFragment.CachedEngineFragmentBuilder(PuFlutterBoostFragment::class.java)
.url(pageUrl ?: "default_route")
.urlParams(pageParams ?: emptyMap())
.uniqueId(uniqueId ?: "${System.currentTimeMillis()}_${pageUrl}")
.build()
}

override fun onBackPressed() {
// 从FragmentManager中获取当前的Fragment
val fragment = supportFragmentManager.findFragmentById(android.R.id.content) as? FlutterBoostFragment
if (fragment != null) {
fragment.onBackPressed()这种实现方式

Start by reproducing the four-level Activity → HomeFragment → TypeFragment → CategoryFragment navigation on the reported Huawei Mate 20 Pro configuration, using Flutter SDK 3.16.9 and FlutterBoost 5.0.0. Read the lifecycle logging in PuFlutterBoostFragment and the creation and back-navigation paths in PuFlutterBoostActivity; done means identifying why destruction is delayed and confirming the delay is removed or explained without breaking the three-level case.

Written by the indexing model from the issue text.