Two Player portraits are missing

Platform:
PC (GOG)

Do you have any mods?
No

Please explain the issue is in as much detail as possible:
During character creation, two of the player portraits are missing, more specifically the ones labeled PlayerFighter02.png and PlayerWizard03.png (Category:Portraits - Pathfinder: Kingmaker Wiki).

This is a persistent issue in that I have footage of streamers that show them missing the exact same portraits as far back as October/September 2018 (ShinoSeven | Let's Play Pathfinder: Kingmaker (Paladin/Hard) - Episode 1 - YouTube, https://youtu.be/7YSTRxTmcOU?t=187), as recently as August 2020 (Let's Play Pathfinder: Kingmaker - Hard Mode (Session 1) - "Jamandi Aldori's Mansion" - YouTube), and even in the beta for WotR (https://youtu.be/3TJi6PpOHx4?t=141).

At the same time, I can find a video a video as far back as September 2018 (Let's Play Kingmaker - Ep. 01: A New Chapter - YouTube) and as recent as March 2020 (https://youtu.be/8fcG543oqU4?t=72) where these portraits are included, as well as several videos from 2019 (https://youtu.be/-h_bNA0nHcA?t=177, https://youtu.be/uB_wtcFYkRs?t=440, https://youtu.be/fe7-c5AJntM?t=89) . And of course Owlcat’s own youtube channel gives me a copy of the WotR beta where these two portraits are included (Core Difficulty Stream #1 | Pathfinder: Wrath of the Righteous Beta With Owlcats - YouTube).

In conclusion, the bug of the missing portraits has been a thing since release all the way until today, and has even managed to jump games to WotR, and it’s affected a ton of different people. At the same time, for all this length of time there have been people completely unaffected by the bug, with seemingly no explaanation as to why. My best guess is that this is a Steam vs GOG issue (I myself play on GOG), but I really have no proof for what exactly causes this.

As a sidenote, I thought that all th enpc portraits were removed from the character creation screen with the Enhanced Edition update, but they stil lshow up for me. This doesn’t seem to be related to the missing portratis bug since one of the videos that with the missing portraits included (the first one from 2019) also features the npc portraits very prominently.

PlayerFighter02.png is a bonus portrait from Royal Ascension DLC or from the Imperial Edition

I’m guessing PlayerWizard03.png is also a bonus portrait.