php - Timber/WooCommerce 3.3.x issue?

Solution:

In case someone else is running into a similar issue, the cause of the problem is the hook used to add WooCommerce support to the theme. I usually use the 'init' hook to add all my theme support, including WC. For v 3.3.0 and up, it appears as though the init hook is fired too late in the process and WC support has to be added using the 'after_setup_theme' hook.