Android `JavascriptInterface` object exists, But It doesn't have any method intermittently

Question

I have tried to leverage web in my Android service using JavascriptInterface. Mostly it works well, but intermittently interface cannot find error occurs.

What I found out by debugging is that:

1. When the error occurred, JavascriptInterface Object exists. When I logged the Object, the reference of the object was logged well. That means object itself is successfully injected from native.

console.log(window['javascriptinterface']) // [object Object]

2. When the error occurred, there's no method on JavascriptInterface object which was well defined in native code.

console.log(window['javascriptinterface']?.someMethod) // undefined

I have stewed over this problem long time, but I failed to find any explicit clue. Currently I suspect that there might be some issue when to invoke javascriptinterface too early. Is it possible for web to invoke javascriptinterface before javascriptinterface object initiate?

Is there anyone who experienced this issue?