When building a signed release version of my app it fails when attempting to load the main file:

jxcore('app.js').loadMainFile()

The error message reported is:

No such native module /data/data/my.app.name/files/www/jxcore/app.js

The debug version of the app works fine.

I found what I believe is the same issue reported in the Thali Project:

thaliproject/Thali_CordovaPlugin#594

I am using version 0.1.1 of the plugin.

UPDATE
After more investigation here are a few more clues:
1/ The signed release app does sometimes start without errors. So maybe looking at a timing/threading issue.
2/ When the app fails the fs extension functions defined in jxcore_cordova.js (existssync, readfilesync) are not even invoked to try to read the app.js. So maybe the problem is somewhere in the main jxcore code rather than the cordova part?
3/ The message "no such native module" seems to be for core node.js modules. There seems to be no attempt made to load app.js