I am currently using Moodle 2.3.1, and I enabled statistics feature. I schedule to run cronjob every day and it can generate daily statistics successfully. However, the cronjob did not generate weekly and monthly statistics reports on end of week/month. The cronjob did not shown any error for weekly/monthly statictics, and it simply skip the generation of weekly/monthly statistics.

The weekly and monthly statistics works fine in Moodle 2.2. The problem starts after I upgraded from 2.2 to 2.3.1.