har-export-trigger does not export serverIPAddress and connection params

I'm trying to get serverIPAddress property with HAR-export-trigger (harexporttrigger-0.5.0-beta.10.xpi) Problem is that serverIPAddress property is not defined for every entry, but if try to manually export HAR file from Firefox (47.0.1, 51.0.1), serverIPAddress property is correctly exported to HAR file.
See attachment- auto and manual



