Since the CSS was downloaded locally, ".." refers to a local resource rather than a remote resource, which means that this and other resources (fonts, etc.) are not loaded.
I'm not sure what the solution to this would be other than parsing through all remote CSS and JS files, identify all of these external resources, download them locally, and include them in my bundle definition.
Am I doing something wrong? This way seems inefficient? I'm pretty sure that v0.10.0 handled this case.