Docker executor fails when network mode is set to host

My .gitlab-ci.yml contains a very simple stage, which depends on a service. When I try to execute it with gitlab-ci-multi-runner exec docker --docker-network-mode=default build it works like a charm, but it fails with the following error when I set the network mode to host:

`--> gitlab-ci-multi-runner exec docker --docker-network-mode=host build         
gitlab-ci-multi-runner 1.1.3 (a470667)
Using Docker executor with image ubuntu ...
Pulling docker image redis:latest ...
Starting service redis:latest ...
Waiting for services to be up and running...

*** WARNING: Service runner--project-1-concurrent-0-redis probably didn't start properly.

container already exists

*********


ERROR: Build failed: container already exists
FATAL: container already exists                    

The execution is also successful, if I remove the service on which stage depends. To reproduce the error, please find attached my .gitlab-ci.yml

I'm using Docker version 1.11.1, build 5604cbe, if it has any importance.