Proposed fix https://github.com/openshift/ose/pull/523
Tested with OCP build 3.4.1.2 and router image v3.4.1.2 92a2e66f058f The new env ROUTER_USE_PROXY_PROTOCOL and accept-proxy was added to the haproxy template and works well. Verify the bug.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2017:0218