Current Value override doesn't work with Javascript SDK

I've added the Javascript SDK to our bundle with web pack. The dev tools can read the features and user attributes no problem, but overriding the Current Value in dev tools doesn't seem to change the feature value.

Javascript Setup:

import { GrowthBook } from "@growthbook/growthbook";

const gb = new GrowthBook({
  apiHost: "https://cdn.growthbook.io",
  clientKey: "******************",
  enableDevMode: true,
  subscribeToChanges: true,
  trackingCallback: (experiment, result) => {
    // TODO: Use your real analytics tracking system
    console.log("Viewed Experiment", {
      experimentId: experiment.key,
      variationId: result.key
    });
  }
});
window.gb = gb; // Expose for debugging

...

gb.setAttributes({
  id: cartToken,
  email: window?.userAttributes?.email,
  customerId: window?.userAttributes?.customerId,
  totalSpent: window?.userAttributes?.totalSpent,
  ordersCount: window?.userAttributes?.ordersCount,
  tags: window?.userAttributes?.tags,
  country: Shopify.country,
  locale: Shopify?.locale,
  currency: Shopify?.currency?.active,
  url: window.location.href,
  userAgent: navigator.userAgent,
  screenWidth: window.innerWidth,
  screenSize: screenSize,
  themeId: Shopify.theme.id,
  themeName: Shopify.theme.name,
  themeRole: Shopify.theme.role
});

//===========================
// setup growthbook
//===========================

export const setupGrowthbook = async function(){

    // Wait for features to be available
    await gb.loadFeatures();

    const value = gb.getFeatureValue("google-top-quality-store");
    console.log("google-top-quality-store", value);

}

Heres the devtools screen:

The feature never shows as a force feature value:

I've been digging through to code to try and find the method by which these are getting set. It seems theres something with messages sent to the window so I started logging any related to GB

window.addEventListener("message", function (event) {
  const data = event.data;
  if(data?.type?.startsWith("GB_")){
    console.log(data);
  }
});

but I only get one message:

{
    attributes: {id: '31295c7d037d94ba9af407aee0fb2eba', email: undefined, customerId: undefined, totalSpent: undefined, ordersCount: undefined, …}
    experiments: {}
    features: { 
        google-top-quality-store : {defaultValue: false, rules: Array(1)}
    }
    overrides: {},
    type: "GB_REFRESH"
}

which also appears to have no overrides.

growthbook / devtools

Current Value override doesn't work with Javascript SDK #49