We do not have source maps for iOS on bugsnag, see https://app.bugsnag.com/nuxeo/nuxeo-mobile/errors/58da60bad17c2417002b4c5e?filters%5Bevent.since%5D%5B%5D=30d&filters%5Berror.status%5D%5B%5D=open
The file is still main.jsbundle but it should be index.ios.bundle, see package.json.
main.jsbundle may be hardcoded also on the XCode project, to check.