Woocommerce Cart lifetime is indefinite – timeout does not clear items

WordPress 5.4.1

woocommerce 3.4.5

Items remain in our cart indefinitely until the order is completed, the problem is that an order was recently left in a users’ cart for several days and once completed the order retained the original date, which causes problems.

I’ve tried adding various ‘wc_session_expiring’ hooks to functions.php but nothing seems to help.

Currently I have this:

// basket timeout
//define the wc_session_expiring callback 
function filter_wc_session_expiring(  ) { 
    return 60*60*48; // 
}; 

// define the filter_wc_session_expiration callback 
function filter_wc_session_expiration(  ) { 
    return 60*60*47; // 
};

// add the filter 
add_filter( 'wc_session_expiring', 'filter_wc_session_expiring', 10, 1 ); 
add_filter( 'wc_session_expiration', 'filter_wc_session_expiration', 10, 1 ); 

It’s not helping though, this does seem to reduce the cart cookie lifetime ‘wp_woocommerce_session_…’ so the problem seems to be that the clearance isn’t being triggered, maybe?