Full Answer
WordPress follows semantic versioning but PHP does not — a PHP 8.4 to 8.5 jump can remove deprecated features outright, and a major WordPress release can drop hooks that have been on the deprecated list for two years. Tracking plugins built for an older API still call those hooks, so the plugin loads but its events never fire. The fix is sequencing: update the tracking plugin to its latest version before updating WordPress, WooCommerce, or PHP, and check the plugin's WordPress.org listing for an "untested with" version warning. If the plugin was last updated more than 90 days ago, expect breakage.
