SSL Certificate going off/on

Hello, on October 30, I got an SSL Certificate from Comodo, and it works, but today I experienced a problem twice, once when I created a new database, and another when I installed something with Softaculous. When I did this, the certificate application was gone and went back to the self-signed, which required me to re-upload the certificate and wait an hour for it to take place again. Can anyone tell me why this is happening?