HTTP service restarting by itself

Hello, I'm having problems with the HTTPD service (apache 2.4). Only today, WHM sent me 10 emails (1 email every 5 minutes) with the alert: Notification The service "httpd" appears to be down. The apache log has the following messages at the exact moment the emails were sent: [Sat May 26 22:19:31.870023 2018] [mpm_prefork:notice] [pid 20449] AH00171: Graceful restart requested, doing restart [Sat May 26 22:19:32.267631 2018] [ssl:warn] [pid 20449] AH01909: proxy-subdomains-ssl-default-vhost.localhost:443:0 server certificate does NOT include an ID which matches the server name [Sat May 26 22:19:32.402682 2018] [:notice] [pid 20449] mod_ruid2/0.9.8 enabled [Sat May 26 22:19:32.411509 2018] [mpm_prefork:notice] [pid 20449] AH00163: Apache/2.4.33 (cPanel) OpenSSL/1.0.2o mod_bwlimited/1.4 configured -- resuming normal operations [Sat May 26 22:19:32.411553 2018] [core:notice] [pid 20449] AH00094: Command line: '/usr/sbin/httpd' [Sat May 26 22:24:33.607178 2018] [mpm_prefork:notice] [pid 20449] AH00171: Graceful restart requested, doing restart
I believe this has something to do with renewing SSL certificates, but I'm not sure and I do not know what I can do to fix this. Apache only returned to normal after I manually restarted via SSH.