wishlist function doesn't depend on these files. You missed to send link on site so we are not able to test. On our sites, wishlist is working also on Wordpress 5.9

Hello, in wordpress 5.8.3, the “wishlist function” stops working.

Posts added to wishlist are not displayed on wishlist page.

These files were changed In wordpress 5.8.3:
/wp-admin/includes/upgrade.php
/wp-includes/class-wp-meta-query.php
/wp-includes/class-wp-tax-query.php
/wp-includes/formatting.php
/wp-includes/post.php

I tryed to return back these files from wordpress 5.8.2 and wishlist function works again as expected.

I don't use cache plugin.

Please, try to update wordpress to version 5.8.3 on any of your demo site and after you add some post to wishlist go to wishlist page and you should not see any added post.


Please try to fix it, thank you.