invisible npc and mob

[Nar]

Hello, i encounter a bug since few days, sometimes npc and mob aren't visible, like literally invisible, all kind of npc, innkeeper, quest giver and the most annoying things is mob, and ofc i'm not talking about mob who can stealth, i play only on hardcore and it's very annoying, i cleant my wdb folder many times but doesn't work, when i "encounter invisible npc/mob i logg out log in, then that work but just for a while, it's unplayable, i have no idea what can i do, am i the only one with this issue ?