@Shu,

Below is the information of my environment. What is yours?

Horizon version
===============

$ git log -1
commit 7c09346e08251a8c5a5f8ae4311b132405d7e1c9
Merge: 368d942 f343212
Author: Zuul <email address hidden>
Date:   Fri Apr 6 10:08:07 2018 +0000

    Merge "Improve mocking in REST API tests (test_network)"

Pip freeze
==========

$ pip freeze
alabaster==0.7.10
alembic==0.9.9
amqp==2.2.2
aodhclient==1.0.0
appdirs==1.4.3
asn1crypto==0.24.0
astroid==1.3.8
attrs==17.4.0
automaton==1.14.0
Babel==2.5.3
backports.ssl-match-hostname==3.5.0.1
bandit==1.4.0
bashate==0.5.1
bcrypt==3.1.4
beautifulsoup4==4.6.0
cachetools==2.0.1
castellan==0.17.0
certifi==2018.1.18
cffi==1.11.5
chardet==3.0.4
-e git://git.openstack.org/openstack/cinder.git@a8a9dda3003f5df77dc17db72167e49200790e88#egg=cinder
click==6.7
cliff==2.11.0
cmd2==0.8.2
colorama==0.3.9
contextlib2==0.5.5
coverage==4.5.1
croniter==0.3.20
cryptography==2.2.2
cursive==0.2.1
ddt==1.1.2
debtcollector==1.19.0
decorator==4.2.1
defusedxml==0.5.0
deprecation==2.0
Django==1.11.11
django-appconf==1.0.2
django-babel==0.6.2
django-compressor==2.2
django-nose==1.4.5
django-pyscss==2.0.2
dnspython==1.15.0
doc8==0.8.0
docker==3.2.0
docker-pycreds==0.2.2
docutils==0.14
dogpile.cache==0.6.5
dulwich==0.19.0
enum-compat==0.0.2
enum34==1.1.6
etcd3==0.7.0
etcd3gw==0.2.1
eventlet==0.20.0
extras==1.0.0
fasteners==0.14.1
fixtures==3.0.0
flake8==2.5.5
flake8-docstrings==0.2.1.post1
flake8-import-order==0.11
Flask==0.12.2
freezegun==0.3.10
funcsigs==1.0.2
functools32==3.2.3.post2
future==0.16.0
futures==3.2.0
futurist==1.6.0
gabbi==1.40.1
git-review==1.25.0
gitdb2==2.0.3
GitPython==2.1.9
-e git://git.openstack.org/openstack/glance.git@67d35f61661b68aa96553ba90535de039130b5fc#egg=glance
glance-store==0.23.0
google-api-python-client==1.6.6
greenlet==0.4.13
grpcio==1.10.0
hacking==0.12.0
-e git+https://git.openstack.org/openstack/heat@a09bce8c5ebbda67344d53d7f53f25f5a7455375#egg=heat
-e git://git.openstack.org/openstack/horizon.git@7c09346e08251a8c5a5f8ae4311b132405d7e1c9#egg=horizon
httplib2==0.11.3
idna==2.6
imagesize==1.0.0
ipaddress==1.0.19
iso8601==0.1.12
itsdangerous==0.24
Jinja2==2.10
jmespath==0.9.3
jsonpatch==1.21
jsonpath-rw==1.4.0
jsonpath-rw-ext==1.1.3
jsonpointer==2.0
jsonschema==2.6.0
-e git://git.openstack.org/openstack/keystone.git@0c5242b6184aa37968266a2fbb1d490208d6a580#egg=keystone
keystoneauth1==3.4.0
keystonemiddleware==4.21.0
kombu==4.1.0
kuryr-lib==0.7.0
-e git+http://git.openstack.org/openstack/kuryr-libnetwork@5bf52b6b14138b9568e86dd20301c9cba93f2e5f#egg=kuryr_libnetwork
libvirt-python==4.0.0
linecache2==1.0.0
logilab-common==1.4.1
logutils==0.3.5
lxml==4.2.1
Mako==1.0.7
MarkupSafe==1.0
mccabe==0.2.1
microversion-parse==0.2.1
mock==2.0.0
monotonic==1.4
more-itertools==4.1.0
mox3==0.25.0
msgpack==0.5.6
msgpack-python==0.5.6
munch==2.2.0
mysqlclient==1.3.7
netaddr==0.7.19
netifaces==0.10.6
networkx==1.11
-e git://git.openstack.org/openstack/neutron.git@1ce070c8e2edcdd58b2c032c3223bde318ec1ee9#egg=neutron
neutron-lib==1.13.0
nodeenv==1.3.0
nose==1.3.7
nose-exclude==0.5.0
nosehtmloutput==0.0.5
nosexcover==1.0.11
-e git://git.openstack.org/openstack/nova.git@8b081453c5ab065932da7ca0b1f663263a3134fe#egg=nova
numpy==1.14.2
oauth2client==4.1.2
oauthlib==2.0.7
openstack.nose-plugin==0.11
openstackdocstheme==1.20.1
openstacksdk==0.12.0
os-api-ref==1.5.0
os-brick==2.4.0
os-client-config==1.29.0
os-service-types==1.2.0
os-testr==1.0.0
os-traits==0.5.0
os-vif==1.10.0
os-win==4.0.0
os-xenapi==0.3.2
osc-lib==1.10.0
osc-placement==1.0.0
oslo.cache==1.30.0
oslo.concurrency==3.26.0
oslo.config==6.0.1
oslo.context==2.20.0
oslo.db==4.35.0
oslo.i18n==3.20.0
oslo.log==3.37.0
oslo.messaging==6.0.0
oslo.middleware==3.35.0
oslo.policy==1.34.0
oslo.privsep==1.28.0
oslo.reports==1.27.0
oslo.rootwrap==5.13.0
oslo.serialization==2.25.0
oslo.service==1.30.0
oslo.utils==3.36.0
oslo.versionedobjects==1.32.0
oslo.vmware==2.27.0
oslotest==3.4.1
osprofiler==2.0.0
ovs==2.9.0
ovsdbapp==0.10.0
packaging==17.1
paramiko==2.4.1
passlib==1.7.1
Paste==2.0.3
PasteDeploy==1.5.2
pathlib==1.0.1
pbr==4.0.1
pecan==1.2.1
pep257==0.7.0
pep8==1.5.7
Pint==0.8.1
pluggy==0.6.0
ply==3.11
prettytable==0.7.2
protobuf==3.5.2.post1
psutil==5.4.3
psycopg2==2.7.4
py==1.5.3
pyasn1==0.4.2
pyasn1-modules==0.2.1
pycadf==2.7.0
pycodestyle==2.3.1
pycparser==2.18
pycrypto==2.6.1
pyflakes==0.8.1
Pygments==2.2.0
pyinotify==0.9.6
pylint==1.4.5
pymongo==3.6.1
PyMySQL==0.8.0
PyNaCl==1.2.1
pyOpenSSL==17.5.0
pyparsing==2.2.0
pyperclip==1.6.0
pypowervm==1.1.13
pyroute2==0.5.0
pysaml2==4.0.2
pyScss==1.3.4
pysendfile==2.0.1
pytest==3.5.0
python-barbicanclient==4.6.0
python-ceilometerclient==2.9.0
python-cinderclient==3.5.0
python-dateutil==2.7.2
python-designateclient==2.9.0
python-editor==1.0.3
python-etcd==0.4.5
python-glanceclient==2.9.1
python-heatclient==1.14.0
python-ironicclient==2.3.0
python-keystoneclient==3.15.0
python-magnumclient==2.9.0
python-manilaclient==1.21.0
python-memcached==1.59
python-mimeparse==1.6.0
python-mistralclient==3.3.0
python-monascaclient==1.10.0
python-neutronclient==6.8.0
python-novaclient==10.1.0
python-octaviaclient==1.4.0
python-openstackclient==3.15.0
python-saharaclient==1.5.0
python-subunit==1.2.0
python-swiftclient==3.5.0
python-troveclient==2.14.0
python-zaqarclient==1.9.0
-e git://git.openstack.org/openstack/python-zunclient.git@bc2bc8ec6112d9dc4261219b8b8212b1d1ddd07a#egg=python_zunclient
pytz==2018.3
pyudev==0.21.0
PyYAML==3.12
qpid-python==1.36.0.post1
rcssmin==1.0.6
reno==2.7.0
repoze.lru==0.7
repoze.who==2.3
requests==2.18.4
requests-mock==1.4.0
requestsexceptions==1.4.0
restructuredtext-lint==1.1.3
retrying==1.3.3
rfc3986==1.1.0
rjsmin==1.0.12
Routes==2.4.1
rsa==3.4.2
rtslib-fb==2.1.66
ryu==4.23
scrypt==0.8.6
selenium==3.11.0
semantic-version==2.6.0
simplegeneric==0.8.1
simplejson==3.13.2
singledispatch==3.4.0.3
six==1.11.0
smmap2==2.0.3
snowballstemmer==1.2.1
Sphinx==1.6.5
sphinxcontrib-websupport==1.0.1
SQLAlchemy==1.2.5
sqlalchemy-migrate==0.11.0
sqlparse==0.2.4
statsd==3.2.2
stestr==2.0.0
stevedore==1.28.0
subprocess32==3.2.7
suds-jurko==0.6
systemd-python==234
taskflow==3.1.0
-e git://git.openstack.org/openstack/tempest.git@6c74e9e06a756724ced1237b955ee3ab965f4b72#egg=tempest
Tempita==0.5.2
tenacity==4.9.0
termcolor==1.1.0
testrepository==0.0.20
testresources==2.0.1
testscenarios==0.5.0
testtools==2.3.0
tinyrpc==0.8
tooz==1.61.0
tox==3.0.0
traceback2==1.4.0
typing==3.6.4
unicodecsv==0.14.1
unittest2==1.1.0
uritemplate==3.0.0
urllib3==1.22
uWSGI==2.0.17
vine==1.1.4
virtualenv==15.2.0
voluptuous==0.11.1
waitress==1.1.0
warlock==1.3.0
weakrefmethod==1.0.3
WebOb==1.7.4
websocket-client==0.47.0
websockify==0.8.0
WebTest==2.0.29
Werkzeug==0.14.1
wrapt==1.10.11
wsgi-intercept==1.6.0
WSME==0.9.2
xattr==0.9.3
XStatic==1.0.1
XStatic-Angular==1.5.8.0
XStatic-Angular-Bootstrap==2.2.0.0
XStatic-Angular-FileUpload==12.0.4.0
XStatic-Angular-Gettext==2.3.8.0
XStatic-Angular-lrdragndrop==1.0.2.2
XStatic-Angular-Schema-Form==0.8.13.0
XStatic-Bootstrap-Datepicker==1.3.1.0
XStatic-Bootstrap-SCSS==3.3.7.1
XStatic-bootswatch==3.3.7.0
XStatic-D3==3.5.17.0
XStatic-Font-Awesome==4.7.0.0
XStatic-Hogan==2.0.0.2
XStatic-Jasmine==2.4.1.1
XStatic-jQuery==1.10.2.1
XStatic-JQuery-Migrate==1.2.1.1
XStatic-jquery-ui==1.12.0.1
XStatic-JQuery.quicksearch==2.0.3.1
XStatic-JQuery.TableSorter==2.14.5.1
XStatic-JSEncrypt==2.3.1.1
XStatic-mdi==1.4.57.0
XStatic-objectpath==1.2.1.0
XStatic-Rickshaw==1.5.0.0
XStatic-roboto-fontface==0.5.0.0
XStatic-smart-table==1.4.13.2
XStatic-Spin==1.2.5.2
XStatic-term.js==0.0.7.0
XStatic-tv4==1.2.7.0
xvfbwrapper==0.2.9
yaql==1.1.3
zope.interface==4.4.3
-e git+https://git.openstack.org/openstack/zun@6a1918e245d142ac237770cbd62b4b94183ff160#egg=zun
-e git+https://git.openstack.org/openstack/zun-tempest-plugin@1585bd9fdc84c31e9b8f777530cf6df70d62a52a#egg=zun_tempest_plugin
-e git+https://git.openstack.org/openstack/zun-ui@7e4bad2c2c994fb42d4b1a4dbd2751767ae4da9f#egg=zun_ui

Browser
=======
See this bug in both Firefox and Chrome (they are auto-upgrade to latest version)

OS
==
Ubuntu 16.04 (English)
$ uname -a
Linux ip-172-31-10-218 4.4.0-1049-aws #58-Ubuntu SMP Fri Jan 12 23:17:09 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux