Core shaders only load after restart when using Vulcan

When using vulcan, equipping a resourcepack that alters core shaders does not alter the shaders modified until you restart your game

Steps to reproduce:

1. Launch minecraft with your graphics api set to vulcan

2. equip the resourcepack provided (It changes xp text color to be different)

3. nothing happens

4. restart your game without removing the resourcepack

5. join back into a survival world

6. the xp text color should be a different color