连接不了手机，识别不到app

**描述问题bug**

项目运行后，打开相应APP，会循环出现以下提示信息：

iOS connection failed, please try pressing the home button to return to the desktop and try again.
iOS连接失败，请尝试按home键回到桌面后再重试

最后项目停止报错信息如下：

wda.exceptions.WDAStaleElementReferenceError: WDARequestError(status=110, value={'error': 'stale element reference', 'message': 'The previously found element "Application ID" is not present in the current view anymore. Make sure the application UI has the expected state. Original error: Error getting main window kAXErrorServerNotFound'})

**python 版本:** `python3.9`

**airtest 版本:** `1.2.6`

**设备:**
iPhone8

**其他相关信息**
更换iPhone12，可正常运行