NextJs - React component methods get called twice per request - reactjs

Question

I'm experimenting with NextJs Custom Server using Express. And i noticed that on every request, getInitialProps gets called twice. When trying to find out what the problem is i stumbled upon React.Strictmode being the reason for that since it calls certain class methods and constructor twice to help debug. When setting it to false, the getInitialProps method gets called three times. NextJs "pages" folder routing is disabled.
To be mentioned that render() gets called twice or three times too.
My server.js :
require('dotenv').config();
const express = require('express');
const next = require('next');
const dev = process.env.NODE_ENV !== 'production';
const mongoose = require('mongoose');
const app = next({ dev });
mongoose.connect(process.env.DB_URI)
.then(()=>{
console.log('>Succesfully connected to the database');
app.prepare()
.then(() => {
const server = express();
server.listen(3000, (req, res) =>{
console.log('>Listening on port 3000');
});
server.get('*', (req, res)=>{
app.render(req, res, '/index', {something:true});
})
})
.catch((ex) => {
console.error(ex.stack);
process.exit(1);
})
})
.catch(e=>{
console.log('<!>Error connecting to database: \n' + e);
});
and my GetInitialProps:
static async getInitialProps(ctx){
console.log({...ctx.query});
console.log('once');
return {props:{...ctx.query}};
}
Console when Strictmode on:
{ something: true }
once
{ something: true }
once
Console when Strictmode off:
{ something: true }
once
{ something: true }
once
{ something: true }
once