Created attachment 192394 [details]
And while I was preparing the upgrade for 0.10.3 upstream released a patch for this version.
A commit references this bug:
Date: Thu Apr 12 04:48:44 UTC 2018
New revision: 467124
security/py-fail2ban: Update to 0.10.3.1
Submitted by: email@example.com (maintainer)
Landed, Thanks :-)