Debugging Timeouts

Has anyone seen this sort of thing before?  I run this code:

Patient myPatient = new Patient();
myPatient.MedicalRecordNumber = "something";
myPatient.SetSummarizedMicrobiologyLabResultList();
            

With a breakpoint on the 3rd line.  While debugging, I then select F10 to Step Over that line.  Then, when I inspect the myPatient object, I get this:

Visits = Function evaluation timed out.

Visits is a property of the Patient class, but nothing is attempting to do anything with that property.   It should simply remain null.  In fact, if I use F11 to Step Into the line, I can then inspect all the properties of myPatient?  It just takes longer.