Make a cy.intercept call in routes with params

[Gu7z]

I'm trying to make calls in my /flag?login=${username} route but I want to change the response from first time call and the nth time.

My cypress code (considering that oldUser.username exists):

let firstTime = true
cy.intercept(`**/flag?login=${oldUser.username}`, (req) => {
  req.reply((res) => {
    res.send({
      firstTime
    })
  })
}).then(()=>{
  firstTime = false
})

Then I click the button that make the api call 2 times and both responses are the same (true). So I tried to change from res.send({ firstTime }) to res.send({ firstTime: Math.random() }) and i got the same number in both api calls.

Any idea?

[Gu7z]

I figured out that when you do some call (with querry) more than one time, the response cannot be setted again until the context end.
Can someone test this?