Searching for external links does not work as expected

Issue Summary

When searching for links in Confluence, no results are shown. The usage of wildcards or escaping characters in wildcard searches as suggested in our documentation does not work as expected. Here is the documentation:

Confluence Search Syntax

Searching for http://, https:// or any combination of those, will return all links present in your instance. Keep in mind that searching for http or https will return the links that are not secure or are secure, respectively.
In HTTP

In HTTPS

Searching for http or http* returns the same results, even though a wildcard has been added.

Also, as soon as the rest of the link is inserted (everything after ://), the page that contains the link is no longer shown in the results, with or without wildcards:

Only Http

Rest of the link with wildcard

Steps to Reproduce

1. Create a new page
2. Insert an external link (example: https://mynewlink.com/guest)
3. Publish the page
4. Search for *mynewlink*, /.*mynewlink.*/, mynewlink or any other combination

Expected Results

The search results contain the page in which the link was placed.

Actual Results

No results are found

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available