Mock server does not recognize difference in query params when browser makes request

I have made a collection of get requests with a mock server by creating an example for every request.
Most of the requests are just different in their query paramaters.
When i make the request out of postman it works fine, the mock server always gives the right response but when i make the request out of my localhost website, postman is not recognizing the difference in the query parameters.
The mock-server always returns the last created response.

one example:
The first request looks like this, its always the initial url when u load the page.
The date is always the current date.

Request 1:
{{url}}/hello/world?part=2&date1=2019-08-11&date2=2019-09-11&users=John+1swe3,Bill+dsx34,Tom+ers35,Floyd+bkl36

Here the query param overview:
part = 2
date1 = 2019-08-11
date2 = 2019-09-11
users = John+1swe3,Bill+dsx34,Tom+ers35,Floyd+bkl36

Response 1:
This request has it own response like example:
{
“data”: “hello request 1”
}

The last request looks like this
{{url}}/hello/world?part=2&date1=2019-07-11&date2=2019-09-11&users=John+1swe3,Bill+dsx34,Tom+ers35

part = 2
date1 = 2019-07-11
date2 = 2019-09-11
users = John+1swe3,Bill+dsx34,Tom+ers35

Here the response of the last request:
{
“data”: “hello last request”
}

Like you see the difference is in param date1, and in users because the last username is missing.

All requests are receiving just the last response and the difference is just in the query parameters.
The problem is only when i make the request out of my localhost website, when i make the request out of postman it works fine.

Iam using the native postman app for Windows with Version 7.5.0.
I made request out of firefox and chrome and its always the same result.

So where could the problem be?
Please help.