window is not defined exception in prod bundle using webpack 5.99

mapbox-gl-js version

v3.13.0

Browser and version

Chrome Version 138.0.7204.184 (Official Build) (64-bit)

Expected behavior

The expected behavior is there are no behavioral diffs between dev and prod bundles.

Actual behavior

Hello,

I have a simple MapBox implementation with React that renders pins and clusters

These are the libraries

"react-map-gl": "8.0.4"
"mapbox-gl": "3.13.0"
"supercluster": "8.0.1"

I am using Webpack 5.99 to bundle.

Node version 24.3.0

When releasing a dev bundle - everything works fine.

When releasing a prod bundle - zooming out to a certain point is causing the map around the initial viewport to disappear (map is not rendered) and the following error is thrown:

Uncaught ReferenceError: window is not defined

Is this a known issue ?
Is it related to webpack or the lib itself ?

Any thoughts, directions or debug instructions will be highly appreciated.

Thanks,
Evgeni

Link to the demonstration

No response

Steps to trigger the unexpected behavior

No response

Relevant log output

Uncaught ReferenceError: window is not defined
    at l (608692cc-458b-4d64-aa0b-5a3f2d64e990:1:20835)
    at 608692cc-458b-4d64-aa0b-5a3f2d64e990:1:22145
    at 608692cc-458b-4d64-aa0b-5a3f2d64e990:1:22533
    at kt (608692cc-458b-4d64-aa0b-5a3f2d64e990:1:22585)
    at Ot (608692cc-458b-4d64-aa0b-5a3f2d64e990:1:23424)
    at 608692cc-458b-4d64-aa0b-5a3f2d64e990:10:213250
    at e.aI.request (608692cc-458b-4d64-aa0b-5a3f2d64e990:10:212754)
    at e.aJ [as loadVectorData] (608692cc-458b-4d64-aa0b-5a3f2d64e990:10:213165)
    at c.loadTile (608692cc-458b-4d64-aa0b-5a3f2d64e990:10:256480)
    at Ee.loadTile (608692cc-458b-4d64-aa0b-5a3f2d64e990:10:290109)

Start by reproducing the production-only failure with mapbox-gl 3.13.0, react-map-gl 8.0.4, Webpack 5.99, and Node 24.3.0, then compare the dev and production bundles around the reported stack trace. Done means identifying whether the window access comes from the library or bundler configuration and documenting a confirmed fix or minimal reproduction.