Outgoing HTTP Header modification

Docker Desktop for Windows
1

Hello,

I am new to docker and I am facing a problem where I do not know where to search for a solution.
I am running Docker Desktpo 4.15.0 containing an iobroker container. This container is executing HTTP requests to other devices in my network and outside the container and host PC.

One request should query my internet router as it is done from other computers with the following request:

Hypertext Transfer Protocol
    GET /login_sid.lua?version=2 HTTP/1.1\r\n
    Content-Type: application/x-www-form-urlencoded\r\n
    Host: 192.168.1.1\r\n
    Connection: close\r\n
    \r\n
    [Full request URI: http://192.168.1.1/login_sid.lua?version=2]
    [HTTP request 1/1]
    [Response in frame: 326]

For whatever reasons the identical request, coming from the docker, are somehow modified and the IP is inserted between the GET and the the /login_sid.lua

Hypertext Transfer Protocol
    GET http://192.168.1.1/login_sid.lua?version=2 HTTP/1.1\r\n
    Host: 192.168.1.1\r\n
    User-Agent: Go-http-client/1.1\r\n
    Connection: close\r\n
    Content-Type: application/x-www-form-urlencoded\r\n
    \r\n
    [Full request URI: http://192.168.1.1/login_sid.lua?version=2]
    [HTTP request 1/1]
    [Response in frame: 300]

Has anyone got an idea which process is intercepting the communication on port 80 with external devices and how such can be deactivated? I read in a other forum that this was working until docker desktop 4.2.0 and afterwards it acts as stated.