Electron: details.webContentsId dissapears in release (session.webRequest.onBeforeRequest event)

Question

I am working in an Electron project in where I have several webviews to load different websites that share the same session (of the type “persist:id”). I have developed an adblock system that works at the level of the webview that works in the following way:

let mySession = session.fromPartition(‘persist:id’);

session.webRequest.onBeforeRequest(['*://*./*'], (details, cb) => {
         if (adBlockActiveForSession(details.webContentsId)){
                  // adblock operations
         }
}

This works in the development and with production flag. However, when I create a release/executable, it doesn't work. I noticed that, in the release, details doesn't have “webContentsId”, but it does in development.

Also I have check the documentation and it says that the webContentsId is an optional value in the onBeforeRequest callback.

why it works in development but not when I create a release? When can webContentsId be access in the parameter details and when it can’t? There is some flag I should use when doing the release package? Should I consider this a bug? has someone experienced the same issue?

Thank you

note: In order to insure that the webview has its webContent id, before loading an url I load an empty site, and after dom ready, I start to do the real url loadings.

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Operating system:

development in Ubuntu, Mac, release in Mac, Windows. Both releases have the same problem.

Expected behavior

onBeforeRequest should return the information of the webContent that has created the request. That information is inside details.webContentsId

Actual behavior

onBeforeRequest returns it when working in development version and with the production on, however, when doing a package to create a release onBeforeRequest doesn’t return the webContentsId of the webContent that did the request