The Remaster Champion is in Player Core 2, which is listed as available on their website, but hasn’t been updated on Archive of Nethys. I don’t have the book myself, but according to a blogpost (https://paizo.com/community/blog/v5748dyo6uib0?Player-Core-2-Preview-The-Champion-Remastered) about it they said they still have causes, they are just not bound to alignment anymore.

There is one: https://www.tuxedocomputers.com/en/TUXEDO-Sirius-16-Gen1.tuxedo#

There was the episode with Scotty in TNG (Relics) where there was indeed the problem of the pattern of the person who was in the buffer with him degrading, but that was over decades (2294-2369), while M’Bengas daughter was in the pattern buffer significantly less time. She was also rematerialised from time to time and it was noted that not doing so risked the integrity of the pattern, which contributed to the issue seen in the TNG episode.