thank you very much to both for the response,
as @krzyc suggested downgrading class-wc-cache-helper.php solves the problem.
For clarification and to make the things easy to others:
*backup the file said:
“wp-content/plugins/woocommerce/includes/class-wc-cache-helper.php”
Edit the file and cut the line 161 [“add_filter( ‘nocache_headers’, array( __CLASS__, ‘set_nocache_constants’ ) );”] and paste on line 24 after [“add_action( ‘wp’, array( __CLASS__, ‘prevent_caching’ ) );”]
tested again following the steps i described before and the problem disappeared.
@mikejolley ty very much for the awesome work, i think is related with W3 Total Cache as suggested @krzyc … i just cleared the caches, didnt deactivated this plugin.
again thx to both for your help.
