Plugin conflict with custom notice

Hi there,

First of all, I love your plug-in and it has been working beautifully since last year.
However, with the more recent versions (not sure when it happened), I noticed the following. When you have a custom notice / error message set in Woocommerce – Like I do – it behaves strangely; it shows the message on my cart page for a brief moment but then it disappears.
When I deactivate your plugin the custom notice is displayed properly like before.
See my code below:

add_action( 'woocommerce_check_cart_items', 'wc_minimum_order_amount', 20 );
 
function wc_minimum_order_amount() {
    // Set this variable to specify a minimum order value
    $minimum = 15;

    if ( WC()->cart->subtotal < $minimum ) {

        if( is_checkout()||is_page('cart')||is_cart() ) {
wc_clear_notices();
            wc_add_notice( 
                sprintf( 'You need to have a minimum of %s to checkout, your total is now %s.' , 
                    wc_price( $minimum ), 
                    wc_price( WC()->cart->subtotal )
                ), 'error' 
            );

        } 

        }
    }

My question is do you guys use the woocommerce_check_cart_items hook or now why this may cause a conflict with your plugin?

Thank you in advance.

Regards,

Eddy