Not a gamebreaking bug, but certainly a little annoying. Some winners don't get added to the winners table. I have two examples. The two cases I've observed this both are Yeti characters, but I don't know if it's related to the race or just a coincidence.
Case 1: Insane Yeti Psyshot winner, winners table
Case 2: Nightmare Yeti Gunslinger winner, winners table
Winners Table not updating (EoR)
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Winners Table not updating (EoR)
My wiki page, which contains a guide and resource compilation and class tier list.