Links break on HTML export file if the page title has a special character

Summary

If a page has special character for instance (,) on its title, the links will break as the URL encoded on the page title encoded with %2C whereby the actual link to the page was encoded to %252C

Environment

• Confluence Cloud

Steps to Reproduce

1. Create a page with a comma (,) on its title (let's say "Test,file");
2. Export the space as HTML 
3. Open the Index.html
4. Select on Test,file link to the page and the below message was shown

Expected Results

The page should be open

Actual Results

Link directed to a file not found error

Workaround 

Open the HTML file with text editor and change the URL to  %252C