fixed bug in handling of sorting named examples

Author: arcuri82

core/src/main/kotlin/org/evomaster/core/search/gene/collection/EnumGene.kt

@@ -82,8 +82,15 @@ class EnumGene<T : Comparable<T>>(
 
             val list = elements
                 .toList() // need ordering to specify index of selection, so Set would not do
-                .sorted() // sort, to make meaningful list comparisons
                 .map { if (it is String) it.intern() as T else it } //if strings, make sure to intern them
+                .run {
+                    if(valueNames == null){
+                        sorted() // sort, to make meaningful list comparisons, but only if examples are not named.
+                                 // otherwise we lose vector alignment
+                    } else {
+                        this
+                    }
+                }
 
             /*
                we need to make sure that, if we are adding a list that has content equal to