now that's interesting. i ran across a similar bug a few times with custom faction. when i set up game with random factions and re-rolled the start with the Ctrl+N shortcut, the random factions were all changed to Altar. Maybe the bug you discovered is related to this?
Interesting, this was a game were I Ctrl+N rerolled because I spawned with no essence anywhere in sight or shards using a custom faction that I wanted to play around with a magic tree game.