停留在二级flutter页面，内存不足时会回收第二个flutter页面，返回到前台后，第一个flutter页面怎么点击都已经无法响应，必须得杀死进程

## Steps to Reproduce
**A small application to reproduce the bug(最小化可复现的demo)**

1. ...
2. ...
3. ...

**Flutter Boost Version**
**Target Platform:**
**Target OS version/browser:**
**Devices:**

## Logs
add your crash log or something else.

```
```

The issue does not identify files, a reproduction app, Flutter Boost version, target platform, OS version, device, or logs. Start by obtaining those details and a minimal reproducible application, then trace the lifecycle behavior when the second Flutter page is reclaimed. Done means the first page responds after returning to the foreground under the reported memory-pressure scenario, with a regression test or reproducible verification.

Written by the indexing model from the issue text.