Adding a link that contains a space URL to an image crops the link after publishing

Issue Summary

Adding a link that contains /wiki/spaces/SPACEKEY/foo turns out to be /wiki/spaces/spacekey after publishing the page.

Steps to Reproduce

1. Create a page.
2. Add an image to the page.
3. Add a link to the image like https://instancename.atlassian.net/wiki/spaces/SPACEKEY/calendar
4. Publish the page.
5. Click the link

Expected Results

The link points to the space calendar.

Actual Results

The link points to https://instancename.atlassian.net/wiki/spaces/SPACEKEY

The changed link can be seen by going to edit mode and clicking Edit Link on the image.

It's the same behavior with all space URLs like /spaces/SPACEKEY/settings/home

Workaround

Using a URL Shortener service for space URLs and add this URL to the image.