Foreman+Libvirt integration - Linux physical bridges not read

Problem:
When deploying a VM on a Libvirt Compute Resource, in the Interfaces tab, under Edit interface, Libvirt section, if I select Network Type “Physical(Bridge)” the bridge information is not read from the Libvirt host.
Expected outcome:
When deploying a VM on a Libvirt Compute Resource, in the Interfaces tab, under Edit interface, Libvirt section, if I select Network Type “Physical(Bridge)” the bridge information SHOULD be read from the Libvirt host. There should be a drop down list with all the bridges defined there.
Foreman and Proxy versions:
1.18.1
Foreman and Proxy plugin versions:
tfm-rubygem-fog-libvirt-0.4.1-2.el7.noarch
tfm-rubygem-ruby-libvirt-0.7.0-2.el7.x86_64
foreman-libvirt-1.18.1-1.el7.noarch
libvirt-libs-3.9.0-14.el7_5.5.x86_64

Other relevant data:
behavious