SSE not working over http2

[masterchief164]

I was trying to use the spdy package to implement SSE in my application. The code worked flawlessly over http1.1 but when I switched over to http2 the sse stopped working. Although the simple get/post requests work but SSE shows net::err_http2_protocol_error and then a new request starts and it gets the data but the connection then closes.
Below is the app.js file

const cors = require('cors');
const spdy = require("spdy")
const express = require('express');
const cookieParser = require('cookie-parser');
const Router = require('./routes/index.router');
const morgan = require('morgan');
const app = express();
const fs = require('fs');

app.use(express.static("public"))

app.use(morgan('dev'))

app.use(cors({
    credentials: true,
    origin: ['http://localhost:3001', 'https://smart-attendance-blue.vercel.app']
}));

app.use(express.json());
app.use(cookieParser());
app.use(express.urlencoded({extended: true}));


app.use('/', Router);


app.get('/', (req, res) => {
    res.send('Hello World!');
});


const port = process.env.PORT || 8000;

const start = async () => {
    try {

        spdy.createServer(
            {
                key: fs.readFileSync("./server.key"),
                cert: fs.readFileSync("./server.crt")
            },
            app
        ).listen(port, (err) => {
            if (err) {
                throw new Error(err)
            }
            console.log("Listening on port 8000")
        })
    } catch (e) {
        console.log(e)
    }
}

start();

This is my sesionController which handles my SSE

    try {
        const user = req.user;
        const courseId = req.query.courseId;
        const document = await addSession(user, user); 
        const session = document.toObject();
        session.nonce = crypto.randomInt(10000000, 99999999);
        const headers = {
            'Content-Type': 'text/event-stream',
            'Connection': 'keep-alive',
            'Cache-Control': 'no-cache',
        };
        res.writeHead(200, headers);
        console.log("wrote")
        session.nonce = crypto.randomInt(10000000, 99999999);
        const data = `data: ${JSON.stringify({id: session._id, nonce: session.nonce})}\n\n`;
        res.write(data);
        let interval = setInterval(async () => {
            session.nonce = crypto.randomInt(10000000, 99999999);
            await client.set(session._id.toString(), session.nonce)
            const data = `data: ${JSON.stringify({id: session._id, nonce: session.nonce})}\n\n`;
            res.write(data);
            console.log("wrote")
        }, 5000);

        req.on('close', () => {
            console.log("closed")
            clearInterval(interval);
        });
        // req.on('error', (e) => {
        //     console.log("error", e)
        // });
        // res.status(200).send(session);
        // console.log(session);
    } catch (error) {
        console.log(error);
        res.status(500)
            .send({error});
    }
}

These are the screenshots of the network tabs and the detailed view of the network requests.