Horizon Forbidden West has been updated to version 1.06 today by Guerrilla Games. You can get the complete patch notes from here.
While Guerrilla Games hasn’t been able to resolve the visual bugs and they are continuing to work on it, they have confirmed that several of the in-game bugs like the Melee Pit bug has been fixed with this new patch. You can get the details on this update with the patch notes given below.