Yoast SEO meta titles are saving correctly in the WordPress admin but not appearing on the live site, likely due to a theme conflict, filter override, or another plugin replacing the <title> tag.

I need an experienced WordPress/SEO developer to quickly identify the root cause and restore Yoast-generated titles across all templates, without disrupting the live site or using broad plugin deactivations.

Deliverable:
Yoast meta titles display correctly on all pages, verified via page source and browser tabs, with a brief explanation of the fix applied.