Vulkan Graphics API & Vsync don't work on MacOS

Description:
When using “Prefer Vulkan” mode in the “Graphics API” settings with VSync enabled, the game’s frame rate is capped at 30 FPS. When tabbing out of the game, the frame rate increases to 60 FPS or behaves inconsistently.

Steps to Reproduce:

1. Enable VSync in the settings

2. Set the Graphics API to “Prefer Vulkan”

3. Join any world

Expected Result:
VSync should cap the frame rate at 120 FPS.

Actual Result:
VSync caps the frame rate at 30 FPS while in-game.