Hi, epicdevspace. Thanks for answer.
I tried to use <?php echo wp_get_shortlink(get_the_ID()); ?> but it’s the same result ??
My Common Settings of Permalinks now is : Post name https://www.uzyn.com.ua/sample-post/
I use it for better reading, but because some times I can change URL name – inside the site I use shortlinks (as I understand they a unique & stable).
Need I check permalinks in other way?
For example, this 2 pages have same ID & I don`t know why. You can see ID (shortlink) in footer (down of page / last text line)
https://www.uzyn.com.ua/category/аф?ша/
https://www.uzyn.com.ua/201508-open-pharmacy/
it`s ?p=11664