Looks like only I have that problem. Basically when King Titan is killed, his corpse just vanish into the air like it was consumed by something. I don't get any dossier and I don't even have change to get Dermis from him but I have him on my Homo Deus Record (probably because its from entering ascencion, not from actual kill). It happened every time I fought him through Gamma, Beta and Alpha difficulty. I've tried even kill it with Admin Rifle to check if my titans was somehow eating it but it didn't work either. I've uninstalled all mods I had but this also didn't help. I'm playing on PC steam ver on Singleplayer. Is it even possible to get dossier/dermis from commands? I've only tried DefeatBoss but it changed nothing