You predicted my answer, team.
This is not technically a bug, as at low levels the Valraven doesn’t have traits. There are also a few rare ways that a Valraven can be affected by Lycanthropy, and this is working as intended.
However, we are looking into how this affects sigils. Even if it is working as intended, we are debating how this affects the spirit of the game, and are looking into things now. (To be clear, we consider this a Quality of Life improvement.)
When I know more I will update you all.