another fix

Author: rhayes777

autofit/mapper/prior/tuple_prior.py

@@ -51,16 +51,17 @@ def instance_tuples(self):
         instances: [(String, instance)]
             A list of instances
         """
-        return list(
-            sorted(
+        return [
+            (key, value.value if isinstance(value, Constant) else value)
+            for key, value in sorted(
                 [
                     (key, value)
                     for key, value in self.__dict__.items()
                     if key != "id" and isinstance(value, (int, float))
                 ],
                 key=lambda tup: tup[0],
             )
-        )
+        ]
 
     def value_for_arguments(self, arguments):
         """