Hello!
Please see how you can solve the problem: the quantity of goods in the “Favorites” is incorrectly displayed on the main one.
The problem is only on the main one.
Probably the problem is in conflicts between WP Super Cache and Yith plugins.
It is required that WP Super Cache produces super cached pages of the entire site:
http://flowers.script-engine.ru/wp-admin/options-general.php?page=wpsupercache
Now Yith works correctly on all super cached pages except the main one.
Please see how you can solve the problem?