[Bug] Terrain has a weird behavior on zoom.

Description

When using the Mapbox terrain layer, zooming in closely causes markers to behave inconsistently — they flicker or jump back and forth instead of staying stable.

This is a screenshots:

And this is the code:
<Map key={mapBoxStyle} ref={mapRefCallback} mapboxAccessToken={mapBoxAccessToken} initialViewState={viewport} mapStyle={mapBoxStyle} onMouseMove={onMouseMove} onMove={evt => setViewport(evt.viewState)} onMouseEnter={onMouseEnter} onMouseLeave={onMouseLeave} projection='globe' onClick={onClick} onContextMenu={onContextMenu} interactiveLayerIds={['docks', 'drones']} terrain={{ source: 'mapbox-raster-dem', exaggeration: 1, }} // maxZoom={19} > <Source id='mapbox-raster-dem' type='raster-dem' url='mapbox://mapbox.mapbox-terrain-dem-v1' tileSize={512} maxzoom={20} /> </Map>

Expected Behavior

Markers should remain stable and fixed in place when zooming.

Steps to Reproduce

1. Enable the terrain layer.
2. Zoom in deeply on the map.
3. Observe the marker positions.

Environment

• Framework version: "react-map-gl": "^8.0.1",
• Map library: Mapbox (mapbox-gl)- "^3.9.4",
• Browser: Chrome and Firefox.
• OS: Mac and Linux.

Logs

No response

Start with the component configuration shown in the issue and reproduce the behavior using the terrain source, globe projection, and deeply zoomed viewport. Investigate how terrain affects marker positioning, then verify that markers remain stable while zooming in Chrome and Firefox on the reported environments.