do not relink _categories

Author: archmoj

src/lib/relink_private.js

@@ -24,9 +24,9 @@ module.exports = function relinkPrivateKeys(toContainer, fromContainer) {
         var fromVal = fromContainer[k];
         var toVal = toContainer[k];
 
-        if(toVal === fromVal) {
-            continue;
-        }
+        if(toVal === fromVal) continue;
+        if(k !== '_categories' && toContainer.matches) continue;
+
         if(k.charAt(0) === '_' || typeof fromVal === 'function') {
             // if it already exists at this point, it's something
             // that we recreate each time around, so ignore it