Yoast stopped analysing Types custom fields with 14.6 update

Symptoms

Types includes an integration with Yoast, as described here: https://toolset.com/course-lesson/seo-for-custom-fields-using-toolset-and-yoast-seo/

The 14.6 update of Yoast broke the integration, since when the values of Types custom fields are no longer being included in Yoast content analysis.

Workaround