自定义事件

用的flutter_boost最新版本，flutter给原生发送事件，原生可以接收到，但是原生给flutter发送事件flutter端接受不到 这是怎么回事？

Start by reviewing the reported Flutter-to-native and native-to-Flutter event flow and the two attached screenshots, then reproduce the native-to-Flutter delivery failure with the latest flutter_boost version. Done means custom events sent from the native side are received by Flutter; the issue does not name files or tests to run.

Written by the indexing model from the issue text.