When customizing the static contents source path then...

Not an issue - suggestion / helper.

https://stackoverflow.com/questions/48722223/flask-cant-find-static-files-with-webpack/48722831#48722831

app = Flask(__name__, static_folder='../client/dist/', template_folder='../client/dist/', static_url_path="")

Set the static_url_path="" to empty string otherwise will not find the resources from the custom path.