Ever come across clients that all of a sudden have their contact logs not showing from the Enrolments & Results area?
This is a common occurrence, and is easily fixed.

The contact logs on the Enrolments and Results area has a filter and likely this is set on a status that doesn't show logs for the client.
If changed to filter on "Both Open & Closed" all will appear

 

If for any reason that you need to transfer a client from one course to another and want to avoid losing any created contact logs relating to the original course, open the log and change the contact log from a course to generic contact related log.
See image below for an example: