are you using a middleware for your language stuff? If so, the middlemare might remove the query param

Correct, I was looking for an issue there, but I was not able to find if the problem is actually there

yes

Why would it return it at first and then remove it?

This happens only if I insert URL directly into the browser. If I change the query params via router for example it works just fine

The query params are deleted, because you don’t add them here: (see attached). You might want to add the query Params there as well to prevent deletion

but that part of the code is not called if I access /en/something directly and they are deleted anyway

I tried doing this: request.nextUrl.pathname = /${locale}${pathname}${request.nextUrl.search};

but that does not help

that will do: en/signup%3Freferral=222?referral=222

The request object already contains the data about the query params

hm ok, can you provide a reproduction from the error via jsfiddle or https://codesandbox.io/ . Like that we will be able to help you better

@Tibetan Mastiff you want to delete the param on redirect or want to keep it during redirect?

There is no error unfortunately (that would help).

1. I want to be able to past a link containing params (/en/signup?referral=something) to the browser and be able to access these params.

Actual behaviour:

1. I can console log it once, but there seems to be a re-render on which these params are deleted

Hello, issue described in message above

In that page and client components I have nothing that should change the URL. I have this issue also on static pages, that contain only texts, that makes me believe its either Middleware or Layout or Next.js internal issue

Same behaviour in DEV and PROD

ah yea, no error. I mean unexpected behavior. It seems like you cant reproduce it inside a clean enviorement. I guess then I can't help you more, because it looks like a local issue

Let me try to reproduce in local enviroment

Better would be to reproduce it in a cloud Environment like https://codesandbox.io/

@Tibetan Mastiff can you share the link of the cloud reproduction?

Hello, found an issue, it was indeed the translations feature, but it was on my side. Thanks for support.

Can you share the full solution, so everyone else who encounter this issue will know the solution?

@Tibetan Mastiff?

Hello, the issue was project specific. It was becuase of my implementation of language switcher. Which used this hook: