Hi @countryl,
That is indeed strange, the titles are not being echoed to the page at all, including for the built-in WooCommerce tabs. Do you have any other plugins that modify the WooCommerce tabs? Does your theme come with tab or WooCommerce-related settings?
The tab markup is defined in the yourtheme/woocommerce/single-product/tabs/tabs.php file (looks like this). If your theme doesn’t have this file, that means you are using the default WooCommerce markup. If it does, make sure the tabs are actually echoing the title.
Check to see if any of your theme files are manually overriding the tabs array. You can do a “find in files” in your theme for woocommerce_product_tabs, and see if anything pops up. More details on that hook here.
I have to assume that this is an issue with your theme, since the description tab is also title-less.
Let me know what you find,
Jon
