Trying to access array offset in class-wp-site-health.php

Hello,

On my WordPress sites, I usually deactivate WP Cron and activate the Cron from CPanel. I’m using PHP 7.4.

From time to time, I receive this email:

Notice: Trying to access array offset on value of type int in /home/user/public_html/wp/wp-admin/includes/class-wp-site-health.php on line 2303
Notice: Trying to access array offset on value of type int in /home/user/public_html/wp/wp-admin/includes/class-wp-site-health.php on line 2305
Notice: Trying to access array offset on value of type int in /home/user/public_html/wp/wp-admin/includes/class-wp-site-health.php on line 2303
Notice: Trying to access array offset on value of type int in /home/user/public_html/wp/wp-admin/includes/class-wp-site-health.php on line 2305
Notice: Trying to access array offset on value of type int in /home/user/public_html/wp/wp-admin/includes/class-wp-site-health.php on line 2303
Notice: Trying to access array offset on value of type int in /home/user/public_html/wp/wp-admin/includes/class-wp-site-health.php on line 2305

Do you know what can be happening? Many thanks for your guidance!