Toggle visibility of road-number-shield moves the shield below the road instead of invisible

mapbox-gl-js version:
v3.13.0
browser:
Chrome Version 137.0.7151.120 (Official Build) (arm64)

### Steps to Trigger Behavior

1. Create new style and click on +, select components -> Road Network
2. Zoom in to a level where you can see highway shields.
3. Expand the road-labels layer and select road-number-shields
4. Toggle 'v' to see the behavior

### Expected Behavior

Shields appear/disappear

### Actual Behavior

Shields go from rendered above the highway to below it

Reproduce the issue in the style editor using the listed steps, focusing on the road-labels and road-number-shields layers and their visibility toggle. Trace the rendering behavior for the shield layer and verify that toggling it makes shields disappear or reappear without moving them below the highway.

Written by the indexing model from the issue text.