PHP Notice: ob_end_clean(): failed to delete buffer.

Hello,

got the following PHP Notice in the debug log for some time now.

PHP Notice: ob_end_clean(): failed to delete buffer. No buffer to delete in .../wp-content/plugins/wp-external-links/includes/class-wpel-front.php on line 69

Can this be fixed in the next update?
THANK YOU

PS: yes, WooCommerce blocks and this plugin interfere with each other. If both are active, the page is white. (see https://ww.wp.xz.cn/support/topic/conflict-with-woocommerce-blocks-v2-5-1/)