Looks like there were too many certificates created for this hostname.
I see there were 4 records for it and 2 of them issued certificates. This means we’ve reached the limit for the hostname with Let’s Encrypt.
I’m going to manually fix the issue for this instance and see what might’ve caused it to happen too much.
Sometimes it takes minutes for a certificate to be issued depending on DNS and our queues. Sometimes seconds, sure 
Definitely not hours unless the hostname is misconfigured.