override the type only when we have less specific type discovered

converter-sbml/src/main/java/lcsb/mapviewer/converter/model/sbml/reaction/SbmlReactionParser.java

@@ -130,9 +130,11 @@ public class SbmlReactionParser extends SbmlBioEntityParser {
               if (nodeClass == null) {
                 minervaNode = node;
                 nodeClass = node.getClass();
-              } else if (node.getClass().isAssignableFrom(nodeClass) || nodeClass.isAssignableFrom(node.getClass())) {
-                nodeClass = node.getClass();
+              } else if (node.getClass().isAssignableFrom(nodeClass)) {
+                minervaNode = node;
+              } else if (nodeClass.isAssignableFrom(node.getClass())) {
                 minervaNode = node;
+                nodeClass = node.getClass();
               }
             }
           }