express-session session丢失

Question

用express-session,
代码如下：

app.set('trust proxy', 1); // trust first proxy
app.use(session({
    secret: 'keyboard cat',
    resave: false,
    rolling: true,
    cookie: {
        maxAge: 5 * 60 * 1000//5分钟超时
    },
    saveUninitialized: true
}))

有些机器访问session会丢失