Heartbeat Control by WP Rocket allows you to manage the frequency of the WordPress heartbeat API in a few clicks.
The WordPress Heartbeat API is a great feature that provides real-time communication between the server and the browser when you are logged into your WordPress admin panel. It uses the file /wp-admin/admin-ajax.php to run AJAX calls from the browser.
EDIT: quick response from author notes this is not intentional. was able to permanently dismiss by clearing my host Siteground’s cache (from SG Supercacher).
Solid plugin that was ruined by notifications for donations that will reappear every time the admin dashboard loads. No matter how many times you click X to close it. Unfortunate way to ruin a very good plugin.