Requests to my express app gets handled in a sync way (instead of async)

[VenkatSaiVikram]

const express = require("express");

const app = express();

app.all('*', async (req, res) => {
    const reqStartTime = Date.now();
    const random = Math.floor(Math.random() * 10);
    console.log("req received ", req.path, " startTime ", reqStartTime, " randomNum ", random);
    if (random > 5) {
        const promise = new Promise((resolve) => {
            setTimeout(resolve, random * 1000);
        });
        await promise;
    }
    console.log("completed ", req.path, " ", Date.now() - reqStartTime);
    res.send('Hiiiiiiiii');
});

app.listen(3001, () => {
    console.log("Server is running on port 3001");
});

This is my basic express app. When I start the server and hit localhost:3001 in my browser for the first time(lets say 8 seconds) it waits for 8 seconds before sending the response.. but if i hit the same request in another tab (irrespective of the random timeout generated), my second request waits until the first one completes and then gets resolved..

Any issues with my code? or am I missing something?
node version - 18.14.2 & npm version - 9.5.0

[TheDecipherer]

const express = require('express')

const app = express()

app.use(express.json())

app.post('/get', async (req, res) => {
    console.log(req.body)
    const promise = new Promise(resolve => {
        setTimeout(resolve, 8000)
    })

    await promise
    
    console.log(req.body)
    res.send(req.body)
})

app.listen(8000, () => {
    console.log("App running in port 8000")
})

This was my sample code. I kept the timeout fixed and the request did not wait. The same should be the case for random timeouts too. Please recheck.

[VenkatSaiVikram]

This is my modified code and console log order.. first request enters and waits for 8 seconds and seconds request waits for 16 seconds (8 for first and after first completes 8 for second)

I tried the same code with another machine.. its working fine.. what might be the issue with my machine??

console log with time for ref.