Links in markdown files containing @ characters do not pass the correct encoded URL

Summary

Links in markdown files containing @ characters are not redirecting to the correct encoded URL when clicking on them.

Steps to Reproduce

1. Create a markdown file in a repository
2. Add a link with @ character in the URL
3. Open markdown file on Bitbucket (preview mode, not source)
4. Click on the link

Expected Results

The linked URL is encoded correctly and it's accessible from the browser.

Actual Results

Bitbucket redirects to a non-existing URL with the following format: http://<bitbucket_url>/projects/<project_id>/repos/<repository_slug>/null

Workaround

There is no workaround.