remove_filter Woocommerce

Dear all,
Using Woocommerce Product Bundles, which sets a filter in the shopping cart:
In plugins\woocommerce-product-bundles\includes\class-wc-pb-display.php:

// Modify titles.
add_filter( 'woocommerce_cart_item_name', array( $this, 'cart_item_title' ), 10, 3 );

In a plugin, I want to remove this filter in a certain condition:
remove_filter( 'woocommerce_cart_item_name', array( 'WC_PB_Display', 'cart_item_title' ), 10, 3 );

This however, is not working. I have no idea how to debug this. Can someone point me in the right direction?

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