Hello X-team!
we are using a shortcode to integrate a custom PHP script (see below) for the code. If we try to save the page we get a ‘Uh oh! Failed to save Content.’
We are now running Pro 3.1.2. - in prior versions of Pro we were able to save pages with this shortcode.
The workaround we are using is: (1) unregister shortcode (2) edit and save page (3) register shortcode. It would be nice to have a solution by which we can leave the functions.php untouched 
Thanks for looking into this! Have a nice day.
function members_index($params = array()) {
extract($params);
ob_start();
include(get_theme_root() . ‘/members/index.php’);
$ob_str=ob_get_contents();
ob_end_clean();
return $ob_str;
}
add_shortcode(‘members-index’, ‘members_index’);