Export to New Github Repo fails on "return" keypress, but succeeds on button press

🐛 bug report

Preflight Checklist

• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project
  adheres to.
• I have searched the issue tracker for an issue that matches the one I want
  to file, without success.

Description of the problem

When typing in a name for a new repo, if I hit "return" instead of clicking the button to export the sandbox, the export fails to create the repo with all files included. What happens is the repo is created under the name provided but it is completely empty. Only after refreshing the page entirely, then entering a new repo name and clicking the button below the input field does it export correctly.

How has this issue affected you? What are you trying to accomplish?

Minor inconvenience.

To Reproduce

Link to sandbox: link (optional)

Your Environment

Start by reproducing the export flow in the CodeSandbox client, comparing pressing Return in the repository-name field with clicking the export button. Trace the two event paths and verify that both create a GitHub repository containing all sandbox files, without requiring a page refresh.