Squid access.log not incrementing each day

[RobinWright]

Hello!

The access logs are not something I am normally concerned with but I had to check on them today and I noticed rather than having a log that increments each day there is just one (rather large) access.log

I have another PFSense that I look after, the log rotation settings appear to be the same, but it is incrementing as I expect.

Have I missed something obvious?