a in the error sometimes becomes n, I suppose due to dynamic naming at minification

Repo for reproduction: https://github.com/kasunvp/mapbox-gl-test (minimal app)

Error with ember serve --prod (can see the error even without the mapbox-gl access token)
Works with ember serve (have to add a mapbox-gl access token to load the map)

The interesting fact is that we've been using ember-auto-import + mapbox-gl for some time now. Had a same kind of issue with a previous version, it was resolved and was working fine after using the ember-auto-import configuration noParse: /(mapbox-gl)\.js$/ as was suggested somewhere. But not anymore with the latest versions.

Also, if the deprecated ember-browserify addon is used instead of ember-auto-import, it works fine too. So must be an issue in ember-auto-import/webpack combo.

Versions:

• Ember: v3.12.0
• ember-auto-import: v1.5.3
• mapbox-gl: v1.4.1