Websocket routing error

Hi,

I currently run the latest mattermost on 127.0.0.1:8065 behind nginx with port 443 and ssl enabled..

I get this new error in the log after updating to 3.5.1.

Mattermost seems to be working and everything and i cannot seem to find for any resolution on this issue.

[2016/12/08 14:18:02 CET] [EROR] /api/v3/teams/zn93xbjmujbr9ck3riqamggd1e/channels/k3ydqrxxjig3xc8hzmwf563row/posts/since/1480520388773: code=401 rid=11a4t86oajy3xeicwpztrxgunr uid= ip=62.209.162.5 Invalid or expired session, please login again. [details: UserRequired]
[2016/12/08 14:18:02 CET] [EROR] /api/v3/teams/zn93xbjmujbr9ck3riqamggd1e/channels/: code=401 rid=7mmo8hxqxpfozrnrwet8os5yxa uid= ip=62.209.162.5 Invalid or expired session, please login again. [details: UserRequired]
[2016/12/08 14:18:02 CET] [EROR] websocket routing error: seq=1 uid= api.web_socket_router.not_authenticated.app_error [details: ]

Currently i use CentOS Linux release 7.2.1511 (Core)

Nginx configuration is

server {
listen 443 ssl;
server_name domain.tld
add_header Strict-Transport-Security "max-age=31536000";

ssl_certificate    certificatefile;
ssl_certificate_key keyfile;


ssl_session_timeout 5m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
ssl_prefer_server_ciphers on;
ssl_session_cache shared:SSL:10m;

location / {
  gzip off;
  proxy_set_header X-Forwarded-Ssl on;
  client_max_body_size 50M;
  proxy_set_header Upgrade $http_upgrade;
  proxy_set_header Connection "upgrade";
  proxy_set_header Host $http_host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header X-Forwarded-Proto $scheme;
  proxy_set_header X-Frame-Options SAMEORIGIN;
  proxy_pass http://127.0.0.1:8065;
}

}

Any help where to look is very appreciated