CSV stats only works if i remove two backend servers

So everything has been working fine until today after adding more backend server.

If i run the configuration with all the servers in the list csv will start showing blank after doing checks on all servers. But if i do removed two backends server ( doesnt mather what servers or in which backends ) in the configuration csv will work without any problems, i have the same configuration on another server ( master ) and there is no csv stats blank problems when having all the backends servers in the configuration.

Please note that normal html stats page works and i can se all the information, it is just the CSV stats that goes blank: http://x.x.x.x/;csv;norefresh

its seems to be a reported bug https://github.com/haproxy/haproxy/issues/1345

So for now when having all my backends in the configuration i connect to a empty frontend to generate data to haproxy as the slave normally dont get any connection until we switch from master to slave.