Hello,

The issue is that you have enabled the blog design to default and the option doesn’t work for this style.

Screenshot for Clarification: https://prnt.sc/10v4665

We force this title to be always visible when a “large image” post is activated. That’s why it does not work.

If you want to hide the page title on particular posts, you have to switch to “default” post design first. Then the option will work.

Regards.
Xtemos Studios