Not entirely sure why this is happening but when this tattoo mod is applied to a character collection, it then will apply to all actors not just the selected character. This was not happening before the API v4 upgrade from what I can tell as I have tested all the way back to version 0.4.4.4 and it is still occurring. I wonder if this was introduced somewhere along the way in the API v4 refactor? It also took several redraw in order for it to properly apply.