[danielmariveles]

I already tried but still no luck. I also tried to export my previous bp tables and wp_user & usermeta, but still no luck.

[danielmariveles]

Or this one:

$(document).ready(function() {
   if ($("h1:contains('Create an Account')").is(":visible")) {
      $(".field_first-name").remove(); 
   }
});

[danielmariveles]

You can do it using jQuery

$( document ).ready(function() {
    if ($("#register-page").is(":visible")) {
        $(".field_YOUR-INPUT-CLASSNAME-HERE").remove();
        });
     }
});

[danielmariveles]

As a result, the title is not working properly when on the member profile page.