eslint-import-resolver-webpack and import-first

`eslint-import-resolver-webpack` is integrated into [`react-boilerplate`](https://github.com/mxstbr/react-boilerplate), nonetheless, we got a bunch of `Absolute imports should come before relative imports` errors for imports like `'containers/LanguageProvider'` that are actually local, as they're resolved with `webpack`.
Is this an expected behavior or a bug?

Reproduce the reported errors in react-boilerplate with eslint-import-resolver-webpack and the import-first rule, focusing on imports such as containers/LanguageProvider. Determine whether the resolver or rule is misclassifying these local webpack-resolved imports, and document the expected behavior and required change.

Written by the indexing model from the issue text.