FlutterBoost#Oops, Failed to update overlay iOS端启动时有时候会报这个错误，一报这个错app就白屏了，出现这种情况的频次还蛮高，必须清掉后台再重新进才有可能正常进入app

使用的版本4.2.0，手机是iponexr 系统版本是16.1.1
报错日志：flutter: FlutterBoost#Oops, Failed to update overlay. mode=BoostSpecificEntryRefreshMode.add, BoostContainer(name:rootRoutePage, pages:[BoostPage(name:rootRoutePage, uniqueId:11F51639-F3D9-45FF-B562-123A3870A75F, arguments:{animated: false})])

Reproduce the startup flow with FlutterBoost 4.2.0 on an iPhone XR running iOS 16.1.1, using the reported “Failed to update overlay” log as the starting point. Trace the startup overlay update associated with rootRoutePage and verify that the error no longer leaves the app on a white screen.

Written by the indexing model from the issue text.