Why can I map the same ports, but not the different in Docker on Windows?

Question

Windows Server

I have a .NET client-server desktop application. Server listens to a port (WCF). I try to run it in a container and use ports mapping.
When I run
docker run -d -p 9301:9301 <server-image>
And then connect to it with client: net.tcp://_container_host_:9301 . This works.
When I run
docker run -d -p 9302:9301 <server-image>
(or map to any other port). And then connect to it with client: net.tcp://_container_host_:9302 . This doesn't work.
Using Windows Server 2016 (10.0.14393) with Containers feature enabled. Docker 17.06.2-ee-12.
Any ideas why mapping of the same ports works, but not the mapping of the different?

Answer 1

The problem was in WCF. This answer helped:
https://stackoverflow.com/a/10217733/6676957