Icons not showing in Blender 4.5 with the Vulkan backend

When I use the OpenGL backend and invoke the color picker by pressing A, I can see the center image of the color picker and all the coloured icons around it. If I instead use the Vulkan backend, I don't get any visual feedback for pressing A. If I move the cursor where the coloured icons would be, I get the name of the material displayed at the bottom of the invisible color picker.