When downloading a file with a SESSION_DRIVER set to different than "cookie", the downloaded PDF file is corrupt

[leocabeza]

To reproduce:

Visit this repo & clone: https://github.com/leocabeza/adonis-error
yarn
Create an .env file with the contents of .env.example
yarn dev
Go to http://localhost:3333/orders/create
Click "Generate PDF" button.
A corrupt file will be downloaded
You can verify that this doesn't happen if you change the SESSION_DRIVER env variable to "cookie"