Virt-who filter is skipping hosts

Issue

Using the following filter with virt-who is causing an error:

filter_hosts=servername0(0[1-9]|[0-1][0-2])* 
filter_type=regex

The error message is:

2019-09-15 09:46:25,005 [virtwho.virt DEBUG] MainProcess(5896):Thread-3 @virt.py:association:300 - Skipping host 'servername0.domain.com' because its ID was not included in filter '['servername0(0[1-9]|[0-1][0-2])*']'

But this host should be included since "*" is a wildcard. It looks like the filter does not accept the domain name.