rootwrap RegExFilter doesn't work if a ',' (comma) is part of regex

If a regex is required to have a comma ',' also, as part of rootwrap regex filter (for ex. [0-9-,]*) then it doesn't work. It seems oslo-rootwrap code parses a comma as a parameter separator. Using a '\' as escape doesn't work either....

ubuntu@u1604:~$ cat /etc/taas/rootwrap.d/taas.filter
[Filters]
i40e_sysfs_command: RegExpFilter, i40e_sysfs_command, root, i40e_sysfs_command, (?i)(add|rem), [0-9-,]*, (\/home\/ubuntu\/sys\/class\/net\/.*?\/device\/sriov\/[0-9]+\/(vlan|egress|ingress)_mirror)

ubuntu@u1604:~$ i40e.wrap i40e_sysfs_command add 0-4095 /home/ubuntu/sys/class/net/ensp3s9/device/sriov/99/vlan_mirror
+ sudo /usr/local/bin/taas-rootwrap /etc/taas/rootwrap.conf i40e_sysfs_command add 0-4095 /home/ubuntu/sys/class/net/ensp3s9/device/sriov/99/vlan_mirror
/usr/local/bin/taas-rootwrap: Unauthorized command: i40e_sysfs_command add 0-4095 /home/ubuntu/sys/class/net/ensp3s9/device/sriov/99/vlan_mirror (no filter matched)

If comma is removed (for ex. [0-9-]*), then it works fine:-

ubuntu@u1604:~$ cat /etc/taas/rootwrap.d/taas.filter
[Filters]
i40e_sysfs_command: RegExpFilter, i40e_sysfs_command, root, i40e_sysfs_command, (?i)(add|rem), [0-9-]*, (\/home\/ubuntu\/sys\/class\/net\/.*?\/device\/sriov\/[0-9]+\/(vlan|egress|ingress)_mirror)

ubuntu@u1604:~$ i40e.wrap i40e_sysfs_command add 0-4095 /home/ubuntu/sys/class/net/ensp3s9/device/sriov/99/vlan_mirror
+ sudo /usr/local/bin/taas-rootwrap /etc/taas/rootwrap.conf i40e_sysfs_command add 0-4095 /home/ubuntu/sys/class/net/ensp3s9/device/sriov/99/vlan_mirror