Problem with Gitlab/Mattermost on Centos 6 with SCL Apache 2.4

Bit more digging and I have found the following in the logs:

[Mon Mar 21 07:39:17.030403 2016] [authz_core:debug] [pid 28334] mod_authz_core.c(802): [client {ip_addr}:52922] AH01626: authorization result of Require all granted: granted
[Mon Mar 21 07:39:17.030458 2016] [authz_core:debug] [pid 28334] mod_authz_core.c(802): [client {ip_addr}:52922] AH01626: authorization result of <RequireAny>: granted
[Mon Mar 21 07:39:17.030522 2016] [proxy:debug] [pid 28334] mod_proxy.c(1100): [client {ip_addr}:52922] AH01143: Running scheme http handler (attempt 0)
[Mon Mar 21 07:39:17.030537 2016] [proxy_wstunnel:debug] [pid 28334] mod_proxy_wstunnel.c(328): [client {ip_addr}:52922] AH02450: declining URL http://mattermost.example.com/ws://127.0.0.1:8065/api/v1/websocket?session_token_index=0
[Mon Mar 21 07:39:17.030552 2016] [proxy_ajp:debug] [pid 28334] mod_proxy_ajp.c(708): [client {ip_addr}:52922] AH00894: declining URL http://mattermost.example.com/ws://127.0.0.1:8065/api/v1/websocket?session_token_index=0
[Mon Mar 21 07:39:17.030566 2016] [proxy_fcgi:debug] [pid 28334] mod_proxy_fcgi.c(944): [client {ip_addr}:52922] AH01076: url: http://mattermost.example.com/ws://127.0.0.1:8065/api/v1/websocket?session_token_index=0 proxyname: (null) proxyport: 0
[Mon Mar 21 07:39:17.030579 2016] [proxy_fcgi:debug] [pid 28334] mod_proxy_fcgi.c(950): [client {ip_addr}:52922] AH01077: declining URL http://mattermost.example.com/ws://127.0.0.1:8065/api/v1/websocket?session_token_index=0
[Mon Mar 21 07:39:17.030595 2016] [proxy:debug] [pid 28334] proxy_util.c(2020): AH00942: HTTP: has acquired connection for (*)
[Mon Mar 21 07:39:17.030611 2016] [proxy:debug] [pid 28334] proxy_util.c(2072): [client {ip_addr}:52922] AH00944: connecting http://mattermost.example.com/ws://127.0.0.1:8065/api/v1/websocket?session_token_index=0 to mattermost.example.com:80
[Mon Mar 21 07:39:17.031538 2016] [proxy:debug] [pid 28334] proxy_util.c(2194): [client {ip_addr}:52922] AH00947: connected /ws://127.0.0.1:8065/api/v1/websocket?session_token_index=0 to mattermost.example.com:80

Which has a declining URL http://mattermost.example.com/ws://127.0.0.1:8065/... which looks like it hasn't switch protocols.