Links to filesystem are lost after editing a page

Summary

Links to filesystems are lost after editing a page.

Environment

• Cloud 1000.340.2

Steps to Reproduce

1. Go to any page on Confluence and add a web link file://j:\\Projects\\XXX\\Reference_Document
2. Save the page
3. Check that the link is still there
4. Edit the page

Expected Results

Even when editing the page, links should remain on the page.

Actual Results

Links are removed from the page.

Storage format before:

<p><a href="file://testing/test.xml">test</a><a></a><a></a></p><ac:structured-macro ac:name="tip" ac:schema-version="1" ac:macro-id="5da7fd26-ee1a-4fe5-a582-dcf9bfaf8f45"><ac:rich-text-body>

Storage format after:

<p><a>test</a><a></a><a></a></p><ac:structured-macro ac:name="tip" ac:schema-version="1" ac:macro-id="5da7fd26-ee1a-4fe5-a582-dcf9bfaf8f45"><ac:rich-text-body>

Notes

This works on Confluence 5.10

Workaround

None so far.