PHP Agent causing Fatal Timeout in Masterminds\HTML5 Serializer

**Issue**

After running drush cr, the heatwave-warning page fails to load when the Elastic APM PHP agent is enabled. The failure is characterized by:

* Fatal errors such as Maximum execution time of 0 seconds exceeded
* Errors in APM agent internals (e.g., PhpPartFacade.php, BootstrapStageLogger.php, SinkToCExt.php)
* Page succeeds only when Xdebug is enabled

**Environment**

* Drupal site (10.x) running on PHP 8.1 RHEL8.10
* Elastic APM PHP agent version: 1.14.1 and later 1.15.1
* PHP-FPM service: php-fpm
* php.ini located at /etc/php.ini

**To Reproduce**
Currently we don't have steps to reproduce the issue