Plesk 12.x / Linux :: After Mod Security Logrotate New Log Is Empty

Plesk 12 on Centos 6.5

I added the following to my /etc/logrotate.conf

/var/log/modsec_audit.log {
missingok
daily
rotate 4
compress
}

I'm not exactly sure if the above is the correct syntax, but the result was that two days later my current modsec_audit.log was Gzipped and a new modsec_audit.log was created.

The problem is that nothing was logged to this new file.

From the Plesk 12 control panel I turned off mod security and then turned it back on again and hey presto, the new logfile started to log events.

This leaves the problem of why nothing was recorded when the file was created.