Issue submission reset if trying to send using github

[BANOnotIT]

The site loses form content when person clicks "github" button in the end of the workflow.

Reproduction

1. Log out from https://webcompat.com/
2. Revoke access for webcompat in github apps
3. Go to the https://webcompat.com/issues/new
4. Fill up form
5. In the end, click github button instead of anonymous
6. Go through github authorization

Expected

To be on a github issue page or https://webcompat.com/issue/XXXX page

Actual result

Redirected to https://webcompat.com/ with no ability to restore already filled issue form