Hi,
We have 2 inconsistant problems in a number of our environments. Ranging from version 5.7.4 to 7.0.5.
The first is recognition of changes. We may delete a job for example. The following morning the job runs when it no longer exists. Even the Visual Cron start and completion messages appear. Similar problems have happened in the past when creating new triggers. The fix for us is restarting the Visual Cron service.
The second issue - We have an environment that uses write to files to trigger processes across multiple servers. This works very well, but now and again the file change is not recognised by a server, again once we restart the service it works fine.
Sorry, I have kept this quite vague as I'm not sure what kind of additional information you require.
Regards,
Gavin