firebase functions (emulator) + axios behaves differently on Windows and Mac - node.js

Question

When I run a firebase functions locally on emulator, it works expectedly on Windows, but the same code doesn't work on Mac environment(I tried on two Mac: M1 and Intel, and neither doesn't work).
What I want to do is axios.post() to a specific API endpoint with:
query strings as authorization keys
accessing through squid proxy(SSL enabled) to make source IP address fixed
My firebase functions code here:
import functions from 'firebase-functions'
import https from 'https'
import axios from 'axios'
import {createHash} from 'crypto'
export default functions.region('asia-northeast1').https.onRequest(async (req, res) => {
const sharedKey = "abcdefghijklmn"
const randomKey = "opqrstuvwxyz"
const sha256Hex = createHash("sha256").update(sharedKey+randomKey).digest("hex")
const base64Encoded = Buffer.from(sha256Hex).toString('base64')
await axios.post(
`https://my.target.api.com`,
{},
{
params: {
auth_cd: base64Encoded,
auth_key: randomKey,
companyId: "myCompany"
},
// Below is just to avoid axios's error "Hostname/IP does not match certificate's
httpsAgent: new https.Agent({
rejectUnauthorized: false,
}),
proxy: {
protocol: "https",
host: "my.squid.proxy.com",
port: 8080,
auth: {
username: "username",
password: "password"
}
}
}
)
.then(result => {
console.log(result)
}).catch(error => {
console.log(error);
})
res.status(200).end()
})
And this gives me an error "ERROR_LOGIN_AUTH_FAILED" on Mac, which is reproducible on Windows too in condition that one or more of the three params (auth_cd/auth_key/companyId) are wrong.
Also, I made development environment same both on Mac and Windows:
Node.js: 14.19.3 (actually, here is another problem that if it's v16, the code above doesn't work on Windows too...)
Java(firebase-functions uses): 11.0.16
all the npm packages versions
axios/firebase-functions/firebase-tools are the latest
The other codes are the same too (cloned freshly from remote git repo)
I suspect this must be triggered some sort of difference on internal handling (like char code?) in axios, but no clues in my hand...
Any advice would be appreciated.