Empty hover tooltip appears on multiple ticket links across the Server Environment page

[d-claassen]

Issue Description

While browsing the Server Environment page of the WordPress Hosting Handbook, an empty tooltip/cardify box appears when hovering over multiple linked Trac ticket references in the WordPress 6.9 section.

This issue was resolved in the past for #353, but returned when #383 got resolved. Flagging this now, so it won't return when the docs will be updated for WP 7.1 in #397.

Steps to Reproduce

1. Navigate to: https://make.wordpress.org/hosting/handbook/server-environment/
2. Scroll down to the WordPress 6.9 sections.
3. Hover over multiple ticket number links such as:
   • #62061
   • #63061
   • #51525
   • and more.
4. Observe that an empty tooltip/card is displayed on each hover.

Expected Behavior

When hovering over linked Trac ticket numbers, one of the following should occur:

• A meaningful preview of the ticket appears (if supported), or
• No tooltip/card is shown at all.

Actual Behavior

An empty tooltip/cardify box is displayed on hover for multiple links, creating a broken and distracting UI experience.

Screenshot

Environment

• Browser: Firefox 151.0.1 (aarch64)
• Reproducible in Incognito: Yes
• Scope: Affects multiple ticket links, not a single element.