While playing through BP2, I encountered an issue where all character portraits in my party other than my main character (Inquisitor) revert to that of a default fighter portrait that comes with the game when I used custom portraits. Also, when I initiate dialogue with any NPC, they also now have that portrait. I am not using any mods with the game.
Screenshot of what I am talking about: http://imgur.com/8DrPTYR
It is not a big issue for me personally because I don't care much about the NPC portraits, and I can just change the PC portraits manually from the customization menu.
I attached a relevant save and the portraits for all of my party members I was using if this will help at all. Portraits 1,3,4,5,6 correspond to those party members, respectively, while the fcM portrait was for my 2nd member.