The WP-Cron function makes the WordPress powered websites run correctly on any kind of server setups, eliminating most of the specific server requirements, because the WP-Cron function runs every time the site is visited, unlike the normal cron jobs, which runs at time, determined by the server settings.
Some jobs are taking more time, so every time the page is loaded, WordPress checks whether it is necessary to run WP-Cron function and it makes a request to the wp-cron.php file over HTTP. The main task of this file is to keep running WP-Cron function as a separate background process, without slowing down the load time of the requested from the user WordPress page. The life of the WP-Cron function is determined by the all required jobs it needs to complete and the execution time, set in the server configuration. There’s an exceptions when the WP-Cron function can’t complete the jobs or can’t work at all. Situations are different but most people blame WordPress for that.
The WP-Cron is based on the setup of your web host, so not every issue comes from WordPress. It depends on how we can run WordPress in the best possible way. The most common issues are listed below and how to fix them.