When I add, delete or modify a host, changes don't get pushed into the dhcpd.leases file

I see the DHCP GET request in the foreman-proxy log, but I don't see a corresponding POST.

here is an example for when I add a new host, these lines are from the foreman-proxy proxy.log file:

D, [2016-04-24T19:06:03.966992 #22115] DEBUG -- : Added a lease record: 10.92.18.218:00:50:56:9f:12:85
D, [2016-04-24T19:06:03.967082 #22115] DEBUG -- : trying to find an ip address, we got {:from=>"10.93.2.30", :to=>"10.93.2.200"}
D, [2016-04-24T19:06:03.968455 #22115] DEBUG -- : Searching for free IP - pinging 10.93.2.33
D, [2016-04-24T19:06:05.974001 #22115] DEBUG -- : Found free IP 10.93.2.33 out of a total of 170 free IPs
I, [2016-04-24T19:06:05.974987 #22115] INFO -- : 10.93.6.77 - - [24/Apr/2016:19:06:05 +0000] "*GET /dhcp/10.93.2.0/unused_ip?mac=78:2b:cb:05:2e:d2&from=10.93.2.30&to=10.93.2.200* HTTP/1.1" 200 19 2.4588

D, [2016-04-24T19:06:05.976574 #22115] DEBUG -- : close: 10.93.6.77:42280
D, [2016-04-24T19:07:09.174481 #22115] DEBUG -- : accept: 10.93.6.77:42283
D, [2016-04-24T19:07:09.178295 #22115] DEBUG -- : Rack::Handler::WEBrick is invoked.
D, [2016-04-24T19:07:09.184547 #22115] DEBUG -- : require_ssl_client_verification: skipping, non-HTTPS request
I, [2016-04-24T19:07:09.185177 #22115] INFO -- : TFTP: entry for 78:2b:cb:05:2e:d2 created successfully
I, [2016-04-24T19:07:09.185641 #22115] INFO -- : 10.93.6.77 - - [24/Apr/2016:19:07:09 +0000] "POST /tftp/syslinux/78:2b:cb:05:2e:d2 HTTP/1.1" 200 - 0.0036

D, [2016-04-24T19:07:09.186824 #22115] DEBUG -- : close: 10.93.6.77:42283
D, [2016-04-24T19:07:09.193574 #22115] DEBUG -- : accept: 10.93.6.77:42284
D, [2016-04-24T19:07:09.196781 #22115] DEBUG -- : Rack::Handler::WEBrick is invoked.
D, [2016-04-24T19:07:09.197603 #22115] DEBUG -- : require_ssl_client_verification: skipping, non-HTTPS request
D, [2016-04-24T19:07:09.198209 #22115] DEBUG -- : Starting task: /usr/bin/wget --timeout=10 --tries=3 --no-check-certificate nv -c "http://mirrors.labs.marinsw.net/centos/6.7/os/x86_64/images/pxeboot/vmlinuz" -O "/var/lib/tftpboot/boot/CentOS-6.7-x86_64-vmlinuz"
I, [2016-04-24T19:07:09.201186 #22115] INFO - : 10.93.6.77 - - [24/Apr/2016:19:07:09 +0000] "POST /tftp/fetch_boot_file HTTP/1.1" 200 - 0.0012

D, [2016-04-24T19:07:09.202448 #22115] DEBUG -- : close: 10.93.6.77:42284
D, [2016-04-24T19:07:09.205451 #22115] DEBUG -- : accept: 10.93.6.77:42285
D, [2016-04-24T19:07:09.208737 #22115] DEBUG -- : Rack::Handler::WEBrick is invoked.
D, [2016-04-24T19:07:09.209785 #22115] DEBUG -- : require_ssl_client_verification: skipping, non-HTTPS request
D, [2016-04-24T19:07:09.210368 #22115] DEBUG -- : Starting task: /usr/bin/wget --timeout=10 --tries=3 --no-check-certificate nv -c "http://mirrors.labs.marinsw.net/centos/6.7/os/x86_64/images/pxeboot/initrd.img" -O "/var/lib/tftpboot/boot/CentOS-6.7-x86_64-initrd.img"
I, [2016-04-24T19:07:09.210929 #22115] INFO - : 10.93.6.77 - - [24/Apr/2016:19:07:09 +0000] "POST /tftp/fetch_boot_file HTTP/1.1" 200 - 0.0016

D, [2016-04-24T19:07:09.213899 #22115] DEBUG -- : close: 10.93.6.77:42285

I see the GET /dhcp/10.93.2.0/unused_ip?mac=78:2b:cb:05:2e:d2&from=10.93.2.30&to=10.93.2.200, foreman gets an IP but the dhcpd.leases file is not updated

I don't know if this is a bug or a miss configuration on my part. This use to work in foreman 1.10.2
I noticed the issue today, I upgraded form 1.11.0 to 1.11.1 today (just in case)

both theforeman and the foreman-proxy are at 1.11.1

any help with be appropriated
what should I look at?