cQ-- termination state doubts

[Juan Pablo Mora]

During a period of slowness of my database I see this log (HAProxy 1.7.5):


Feb  4 11:09:30 localhost.localdomain haproxy[23601]: 185.198.176.21:41987 
[04/Feb/2019:11:09:12.408] WWW BUS/BUS2 9/8785/2/8860/17657 200 596 8453 - - 
cQ-- 528/236/37/14/0 0/9 {|3701F3DB6BBF1DAC} {|RESULT_OK_HEADER} "POST /Service 
HTTP/1.1" TLSv1


My timeouts configs are:

defaults
        timeout connect               4s
        timeout client                5s
        timeout server                30m
        timeout http-request          10s
        timeout http-keep-alive        3s

backend BUSINCOMING
        option forwardfor

        timeout connect               5s
        timeout server                2m
        timeout queue                 30s

        http-request deny if { hdr_cnt(content-length) gt 0 } { 
hdr_val(content-length) gt 31457280 } # 30M

       server BUS1  po_emi_0:18001  maxconn 15
       server BUS2  ix_emi_0:18001  maxconn 15

The request ends with 200, request and response headers was captured.  If it 
was a timeout client, Why isn't there a -1 in some timer?  And how the "Q" 
termination state can be explained?

Thank you!