Intellij: Unable to have multiple library roots

I feel like I'm in a bit of a unique situation as I can't find any documentation on how to make this interaction work. I have a repository that houses a Flask app that will contain code compiled through webpack from a different root, e.g.:

REPO_ROOT/
|-- src/
    |-- client/
        |-- app/
            |-- css/
                |-- styles.css
            |-- js/
                |-- index.js
            |-- index.html
        |-- node_modules/
        |-- package.json
        |-- webpack.config.js
    |-- server/
        |-- .env/
        |-- app/
            |-- static/
            |-- templates/
            |-- __init__.py
        |-- MANIFEST.in
        |-- setup.py
|-- tests/
|-- requirements.txt
|-- setup.cfg

... other meta files ...

The problem I'm running into: when I open this project, the node_modules directory is correctly identified and I get proper completions in my client/ files, but the Python tools don't. After setting up the Python SDK to point at my virtual environment, I get completions in my server/ files, but it stops client/ from working! Then, it incorrectly marks src as the library root in the Project view.

IntelliJ Ultimate 2019.2.1
NodeJS & Python plugins @ 192.6262.58