When the "before" state of the face set brush gets stored in an undo step and there is no face set attribute yet, 0 was stored instead of 1. 0 currently has special meaning and isn't the default white color.
When the "before" state of the face set brush gets stored in an undo step and there is no face set attribute yet, 0 was stored instead of 1. 0 currently has special meaning and isn't the default white color.