Whenever you select show module title, no title shows. The answer may lie in your template ...

Quite a common problem - especially when learning to build your own templates (like we once were - yes, we're all on the j-journey).

When you choose the option of displaying the module title, the title doesn't show - what's the problem?

Well, more often than not it's a simple template manouvre. You will probably find that you or the template-writer hasn't defined the style in your modules to read the xhtml.

In other words, check out the style parameter, where you are including modules.

In a nutshell,

in your template's index.php file sometimes calle the html file,  find instances of where the module in question is being called up

 ie.   <jdoc:include type="modules" name="MOD_IN QUESTION" .....

then make sure the style parameter reads style="xhtml"

ie.  <jdoc:include type="modules" name="MOD_IN QUESTION" style="xhtml" />