返回首页时偶尔会报这个错误

15:22:46.558 [JS Framework] Failed to execute the callback function:
15:22:46.579 TypeError: undefined is not an object (evaluating 'plus.webview.currentWebview().getTitleNView')
15:22:46.600 reportJSException >>>> exception function:callJS, exception:JavaScript execute error!Exception: TypeError: undefined is not an object (evaluating 'plus.webview.currentWebview().getTitleNView')
15:22:46.621 weex createInstanceContext:2804:48
15:22:46.642 (weex framework):2:437820
15:22:46.662 consume@(weex framework):2:1418
15:22:46.683 map@[native code]
15:22:46.726 getTemplateInfo== template md5 null ,httpHeader:{}