slack:// links do not work properly

Summary

When creating a web link, using a slack:// URL in the link appears to work in the editor, however it does not work after being published. It simply does nothing.

Environment

Cloud
Confluence

Steps to Reproduce

1. Edit a page
2. Add a link using the "Insert Link" Macro.
3. In the link dialog, select "web link"
4. In the Address use a valid slack:// URL.
5. use the link in the editor (see that it works)
6. Publish the page

Expected Results

The Link works as expected and opens slack to the resource specified by the link

Actual Results

Clicking the link does nothing

Notes

Viewing the HTML from confluence using the chrome inspector, I see that the element is like so:

<a href="slack://channel?team=T12345">This is a link</a>

Using the link in a simple HTML page seems to work, but it does not work out of confluence.

Workaround

No workaround at this time.