Regression in 16.2.0: `bindI18nStore` does not work correctly

[schulzjo-tng]

🐛 Bug Report

The test below passes on 16.1.4 but fails on 16.2.0: The final assertion expects the text to have changed to German, but it is still in English.

To Reproduce

Run the following vitest:

import { act, render, screen } from "@testing-library/react";
import { createInstance } from "i18next";
import { I18nextProvider, useTranslation } from "react-i18next";
import { expect } from "vitest";

it("regression in 16.2.0", async () => {
    const i18next = createInstance();
    await i18next.init({
        fallbackLng: ["en"],
        react: { bindI18nStore: "added" },
    });
    const TranslateAKey = () => {
        const { t } = useTranslation();
        return <h1>{t("key", { ns: "namespace" })}</h1>;
    };
    i18next.addResourceBundle("en", "namespace", { key: "english" }, false, true);
    render(
        <I18nextProvider i18n={i18next}>
            <TranslateAKey />
        </I18nextProvider>,
    );
    expect(screen.getByRole("heading")).toHaveTextContent("english");
    await act(() => i18next.changeLanguage("de"));
    expect(screen.getByRole("heading")).toHaveTextContent("english");
    await act(() => i18next.addResourceBundle("de", "namespace", { key: "deutsch" }, false, true));
    expect(screen.getByRole("heading")).toHaveTextContent("deutsch"); // this assertion fails
});

Expected behavior

The test should pass.

Your Environment

• runtime version: node v22
• i18next version: 25.6.0
• Windows
• Relevant packages:
  • "react": "18.3.1"
  • "@testing-library/react": "16.3.0"
  • "i18next": "25.6.0"
  • "react-i18next": "16.2.0"
  • "vitest": "3.2.4"
  • "jsdom": "27.0.1"

[adrai]

currently afk... can you try to address this and provide a PR?

[adrai]

should be addressed in v16.2.1

[schulzjo-tng]

That works, thank you for the quick fix!