My familiars seem to think they're Tiax. Was driving myself crazy trying to figure out what this issue could possibly be until I ended up going through my install order one by one until the problem cropped up. Turns out it's SRR. Regular SR doesn't have this issue, but the moment I install Revised, it pops up. I searched this thread to see if it was posted about, and I found some from earlier last year, but it seems to have come back.
Screenshot was taken from a completely clean install of BGEE 2.6 with SoD, no DLC merge or anything.