Accessing forwarded port from Docker container

Hello,

I am using the `PortForwardingSession` to access some services in our AWS account. When using it locally everything works fine and I have access via `localhost:`. However, inside a docker container I'm not able to access the same port. At the same time I am able to access a different port with a local web server without any issues. So the problem only seems to exist in combination of SSM and Docker.
When using `nmap` from inside the container it also shows the port used for the forwarding session as closed.

```
docker --version -> 20.10.8
session-manager-plugin --version -> 1.2.245.0
```
running on Ubuntu 20.04.3 LTS

Do you know any reason why the SSM port behaves differently in comparison to e.g. a webserver.

Many Thanks!