How does async/await block in koa?

problem description

needs the output result to be 1
blocking execution before output 3, waiting for 2

related codes

/ / Please paste the code text below (do not replace the code with pictures)

const Koa = require("koa");
const app = new Koa();
app.use(async (ctx, next) => {
    console.log(1);
    await next()
    console.log(3);
});
app.use(async (ctx, next) => {
    setTimeout(() => {
        console.log(2);
    }, 2000);
});
app.listen(3001);
console.log("http://localhost:3001")

what result do you expect? What is the error message actually seen?

expect to output in the order of 1, 2, 3

const Koa = require("koa"); const app = new Koa(); app.use(async (ctx, next) => { console.log(1); await next() console.log(3); }); app.use(async (ctx, next) => { return new Promise((resolve, reject) => { setTimeout(() => { console.log(2); resolve(); }, 2000); }) }); app.listen(3001); console.log('http://localhost:3001')