We are using Moodle 3.5 and Custom Certificate plugin in some courses.
The plugin is configured to email students the PDF certificate file as soon as the course feedback activity is completed (which requires the student to have passed the test activity before that). The entire system works well and the certificates are generated. The certificate is also emailed to a common email ID which acts like a central register of certificates.
However, we see that some certificates are not being emailed out. For example, we have a course where 131 students completed the feedback activity but only 77 were received in the common email ID. When we check the sent folder of the email box being used to send emails, we see some user certificates were not mailed out at all.
I understand that each time the certificate schedule task runs which is set to 10 min, it picks up those students who have completed the criterion and who have not been sent emails before. But in this case it is not picking up all the students. Some are being left out.
Does anyone have any idea about this pls?