Select filters value not updated – pro add-on

I have seen that there is a reference to the deleted values (ex. city: Rome) ​​within the database table “option”(option name: _transient_….).

If I save an existing item, anyway filters not update.
Only if I put a value into the specific value of new item (city in my example), the filter update (and the row into the table “option” disappears).

Sorry, I mean custom post type post.
(I create a plugin that generate my own custom post type)

Admin Columns – Version 2.1.3
Pro add-on – Version 1.0.7

Hello,
I tried to explore the pro addon plugin files and in the file post.php I tried to comment out the following lines:

if( $cache = $column->get_cache( 'filtering' ) ) {
$options = $cache['options'];
$empty_option 	= $cache['empty_option'];
}

This seems to solve the problem.
What means those lines? If I comment those lines, it might cause me problems?

Thanks