Monsters are still invisible or have broken textures with Vulkan

Bosses are always semi-invisible, while with monsters it only happens now and then, or they just die too quickly to notice. Conqueror mobs are usually invisible as well.

But they're not purely invisible, like the conquerors are visible while they're doing their intro animations, then they flash invisible during certain animations. You can usually see Drox's fists while the rest of him is invisible with brief periods of visibility. I feel like the invisibility can also be triggered by bane and/or soulrend on bosses, possibly combined with a mouse over.