Is Bosses Slain on maps bugged?

https://preview.redd.it/kdnk3rdjkx8e1.png?width=623&format=png&auto=webp&s=6cd91b3bf1980addb3624a64744e44ee5d0142c7

https://preview.redd.it/xpuuhbclkx8e1.png?width=2130&format=png&auto=webp&s=2e1563a4093549902550bf29f49e1f1347bdad2b

I have already slain her once, but noticed on the map that she isnt greyed out. Went back, defeated her again and she didnt even drop anything new nor did the map marking gray out for her.

I have no clue on what bugs exist or dont or if im missing something here, would be nice if someone has any idea of what is happening here and could share it with me.