use `value` in reValidate only if form not change content while render

jsonform.gadget.js

@@ -999,6 +999,9 @@
             ignore_incorrect: opt.ignore_incorrect
           })
             .push(function () {
+              if (gadget.props.changed) {
+                value = undefined;
+              }
               return gadget.reValidate(value, opt.schema);
             });
         });