Description

When using polygon layers with a terrain extension and an onClick handler, picking information is invalid.

• The onClick handler fires with a correct layer reference, but
• The index is erroneous. I've seen two values, 36094 (in my repro app) and 16777214(in my production app)
• The object is therefore null
• Clicking anywhere on the polygon layer gives the same index

Screenshot of the repro here:

Flavors

• Script tag
• React
• Python/Jupyter notebook
• MapboxOverlay
• GoogleMapsOverlay
• CARTO
• ArcGIS

Expected Behavior

Expect to see a valid index, in this case 0 because there's only one polygon

Steps to Reproduce

I've made a complete reproduction here

Environment

• Framework versions:

        "@deck.gl/geo-layers": "^9.1.14",
        "deck.gl": "^9.0.0",
        "mapbox-gl": "^2.15.0",
        "react": "^18.3.1",
        "react-dom": "^18.3.1"

• Browser: Chrome 139.0
• OS: MacOS Sonoma 14.6

Logs

No response