How can I sort time inside list(time)?

So, I regex time from my splunk logs in form of (HH:MM:SS), and I am trying to build the report like **index: _something_ | regex Time | regex Date | regex User | stats list( (regex)Time) by (regex)Date, (regex)User** Unfortunately, the list of (regex)Time is not showing up in orderly manner. How can I make this ordering in ascending manner? Thanks in advance!