daily build of experimental PPA MAAS does not show enlisted node status on Web UI

tested with 14.04.1 server image by virt-manager

Steps to reproduce this bug:
1. install 14.04.1 server image by the selection "Multiple server install with MAAS"
2. after installation, add the ppa ppa:maas-maintainers/experimental,
update source list and then install the daily build of maas, maas-dns and maas-dhcp.
When asked, always choosing the maintainer's configuration.
3. create a maas superuser
4. using browser to log in the host controller[1]
5. import boot image
6. launch nodes by pxe boot. The nodes were boot by pxe and shutdown successfully.
7. back to the browser and check the enlisted node status[2]

Expected result:
[1] node status was shown. 0 node was attached to Networks.
[2] node status was shown. n nodes was attached to Networks. (n > 0)

Actual result:
[1] no node status was shown. 0 node was attached to Networks. Please refer to the attachment screenshot-maas-01.png
[2] no node status was shown. n nodes was attached to Networks. (n > 0) Please refer to attachment screenshot-maas-02-no-nodes.png

More information:
maas.log.tar.gz - log tar ball of /var/log/maas on host controller
dpkg-l.log - there is daily build version

ii maas 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS server all-in-one metapackage
ii maas-cli 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS command line API tool
ii maas-cluster-controller 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS server cluster controller
ii maas-common 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS server common files
ii maas-dhcp 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS DHCP server
ii maas-dns 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS DNS server
ii maas-proxy 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS Caching Proxy
ii maas-region-controller 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS server complete region controller
ii maas-region-controller-min 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS Server minimum region controller
ii python-django-maas 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS server Django web framework
ii python-maas-client 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS python API client
ii python-maas-provisioningserver 1.8.0~alpha1+bzr3523-0ubuntu1~trusty2 all MAAS server provisioning libraries

maas-profilename-nodes-list.log - information dumped by the command "maas profile-name nodes list"

Please note the node status does not show on the web UI but it was shown by this command.