htmx: Failed upgrade makes hx-boost clicks silent – is the default changed?

Problem Statement

After upgrading the htmx library, click interactions that previously relied on hx-boost no longer trigger requests. The page loads, but the console shows no network activity and the DOM does not update.

Diagnostic Constraints

• The application pins a specific htmx file via a CDN, using SRI where possible.
• A prior build remains deployable; rollback is a static‑file change.
• Extensions may have been updated concurrently; the new core may have altered default delegation rules.
• Browser caches can mask which asset is actually executed.

Unresolved Decision

We must determine whether the symptom stems from a changed hx-boost default, an incompatible extension, or a caching artifact before deciding to roll back or refactor markup.

Questions for Investigation

1. Did the htmx release that replaced the previous version modify the default event delegation behavior of hx-boost?
2. Are there any renamed, removed, or added attributes required for hx-boost to function in the new version?
3. Which version‑specific documentation sections detail changes to hx-boost or its interaction with extensions?