WAF not working? Long lost child come home, graceful restarting

Running 9.400-9 soft release. Not sure if the problem is specific to 9.4 or would have existed under 9.3.

WAF log:

2016:04:06-05:43:01 astaro1-1 reverseproxy: id="0299" srcip="127.0.0.1" localip="127.0.0.1" size="1" user="-" host="127.0.0.1" method="GET" statuscode="200" reason="-" extra="-" exceptions="-" time="96039" url="/session-cleanup" server="localhost" referer="-" cookie="-" set-cookie="-"
2016:04:06-05:43:01 astaro1-1 reverseproxy: regular session cleanup: success (sessions deleted: 0)
2016:04:06-05:43:02 astaro1-2 reverseproxy: regular session cleanup: success (sessions deleted: 0)
2016:04:06-05:43:02 astaro1-2 reverseproxy: id="0299" srcip="127.0.0.1" localip="127.0.0.1" size="1" user="-" host="127.0.0.1" method="GET" statuscode="200" reason="-" extra="-" exceptions="-" time="198011" url="/session-cleanup" server="localhost" referer="-" cookie="-" set-cookie="-"
2016:04:06-13:31:27 astaro1-2 reverseproxy: [Wed Apr 06 13:31:27.190702 2016] [mpm_worker:notice] [pid 6068:tid 4148152000] AH00297: SIGUSR1 received.  Doing graceful restart
2016:04:06-13:31:30 astaro1-1 reverseproxy: [Wed Apr 06 13:31:30.767132 2016] [mpm_worker:notice] [pid 6090:tid 4147971776] AH00297: SIGUSR1 received.  Doing graceful restart
2016:04:06-13:31:31 astaro1-2 reverseproxy: [Wed Apr 06 13:31:31.001367 2016] [mpm_worker:notice] [pid 6068:tid 4148152000] AH00292: Apache/2.4.10 (Unix) OpenSSL/1.0.1k configured -- resuming normal operations
2016:04:06-13:31:31 astaro1-2 reverseproxy: [Wed Apr 06 13:31:31.001417 2016] [core:notice] [pid 6068:tid 4148152000] AH00094: Command line: '/usr/apache/bin/httpd'
2016:04:06-13:31:31 astaro1-2 reverseproxy: [Wed Apr 06 13:31:31.001529 2016] [mpm_worker:warn] [pid 6068:tid 4148152000] AH00291: long lost child came home! (pid 7889)
2016:04:06-13:31:31 astaro1-2 reverseproxy: [Wed Apr 06 13:31:31.001579 2016] [mpm_worker:warn] [pid 6068:tid 4148152000] AH00291: long lost child came home! (pid 7890)
2016:04:06-13:31:34 astaro1-1 reverseproxy: [Wed Apr 06 13:31:34.000430 2016] [mpm_worker:notice] [pid 6090:tid 4147971776] AH00292: Apache/2.4.10 (Unix) OpenSSL/1.0.1k configured -- resuming normal operations
2016:04:06-13:31:34 astaro1-1 reverseproxy: [Wed Apr 06 13:31:34.000462 2016] [core:notice] [pid 6090:tid 4147971776] AH00094: Command line: '/usr/apache/bin/httpd'
2016:04:06-13:31:34 astaro1-1 reverseproxy: [Wed Apr 06 13:31:34.000516 2016] [mpm_worker:warn] [pid 6090:tid 4147971776] AH00291: long lost child came home! (pid 8297)
2016:04:06-13:31:34 astaro1-1 reverseproxy: [Wed Apr 06 13:31:34.000543 2016] [mpm_worker:warn] [pid 6090:tid 4147971776] AH00291: long lost child came home! (pid 8298)
2016:04:06-13:33:09 astaro1-2 reverseproxy: [Wed Apr 06 13:33:09.069603 2016] [mpm_worker:notice] [pid 6068:tid 4148152000] AH00297: SIGUSR1 received.  Doing graceful restart
2016:04:06-13:33:09 astaro1-2 reverseproxy: AH00112: Warning: DocumentRoot [/var/www/REF_RevFroInterPlain] does not exist
2016:04:06-13:33:09 astaro1-1 reverseproxy: [Wed Apr 06 13:33:09.989042 2016] [mpm_worker:notice] [pid 6090:tid 4147971776] AH00297: SIGUSR1 received.  Doing graceful restart
2016:04:06-13:33:10 astaro1-2 reverseproxy: [Wed Apr 06 13:33:10.000385 2016] [mpm_worker:notice] [pid 6068:tid 4148152000] AH00292: Apache/2.4.10 (Unix) OpenSSL/1.0.1k configured -- resuming normal operations
2016:04:06-13:33:10 astaro1-2 reverseproxy: [Wed Apr 06 13:33:10.000417 2016] [core:notice] [pid 6068:tid 4148152000] AH00094: Command line: '/usr/apache/bin/httpd'
2016:04:06-13:33:10 astaro1-2 reverseproxy: [Wed Apr 06 13:33:10.000460 2016] [mpm_worker:warn] [pid 6068:tid 4148152000] AH00291: long lost child came home! (pid 10085)
2016:04:06-13:33:10 astaro1-2 reverseproxy: [Wed Apr 06 13:33:10.000484 2016] [mpm_worker:warn] [pid 6068:tid 4148152000] AH00291: long lost child came home! (pid 10086)
2016:04:06-13:33:10 astaro1-1 reverseproxy: AH00112: Warning: DocumentRoot [/var/www/REF_RevFroInterPlain] does not exist
2016:04:06-13:33:11 astaro1-1 reverseproxy: [Wed Apr 06 13:33:11.000749 2016] [mpm_worker:notice] [pid 6090:tid 4147971776] AH00292: Apache/2.4.10 (Unix) OpenSSL/1.0.1k configured -- resuming normal operations
2016:04:06-13:33:11 astaro1-1 reverseproxy: [Wed Apr 06 13:33:11.000779 2016] [core:notice] [pid 6090:tid 4147971776] AH00094: Command line: '/usr/apache/bin/httpd'
2016:04:06-13:33:11 astaro1-1 reverseproxy: [Wed Apr 06 13:33:11.000821 2016] [mpm_worker:warn] [pid 6090:tid 4147971776] AH00291: long lost child came home! (pid 31736)
2016:04:06-13:33:11 astaro1-1 reverseproxy: [Wed Apr 06 13:33:11.000842 2016] [mpm_worker:warn] [pid 6090:tid 4147971776] AH00291: long lost child came home! (pid 31737)

Any ideas what the problem is or where I should look?

Thanks,

James.