The plugin hangman is a hangman game for IRC.
To avoid showing the same word after running a few games, a list is created and should be reused. But the actual code recreates a new list after each game, making possible to have the same word over and over.
Upgrade to a newer version if applicable or apply one of the following fixes:
If you don't have a local copy:
hg clone -u release-x.y http://hg.malikania.fr/irccd
If you already have a local copy:
cd /path/to/irccd hg pull hg up release-2.1
And install new version of irccd.
Download the following patch:
cd /path/to/irccd/ patch -p1 < /path/to/20170727.patch