Warning: Can't perform a React state update on an unmounted component

We use Ant Design 4.x (which uses this library under the hood) and if we try to click an Ant dropdown inside a unit test, we always get this error:

Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in a useEffect cleanup function.
    at Overflow (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-overflow@1.3.1_react-dom@17.0.2_react@17.0.2\node_modules\rc-overflow\lib\Overflow.js:36:32)
    at InheritableContextProvider (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-menu@9.8.4_react-dom@17.0.2_react@17.0.2\node_modules\rc-menu\lib\context\MenuContext.js:31:23)
    at C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-menu@9.8.4_react-dom@17.0.2_react@17.0.2\node_modules\rc-menu\lib\Menu.js:55:27
    at C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\antd@4.24.15_react-dom@17.0.2_react@17.0.2\node_modules\antd\lib\menu\index.js:42:24
    at Menu (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\antd@4.24.15_react-dom@17.0.2_react@17.0.2\node_modules\antd\lib\menu\index.js:150:37)
    at NoCompactStyle (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\antd@4.24.15_react-dom@17.0.2_react@17.0.2\node_modules\antd\lib\space\Compact.js:41:23)
    at OverrideProvider (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\antd@4.24.15_react-dom@17.0.2_react@17.0.2\node_modules\antd\lib\menu\OverrideContext.js:23:21)
    at div
    at Align (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-align@4.0.15_react-dom@17.0.2_react@17.0.2\node_modules\rc-align\lib\Align.js:47:23)
    at DomWrapper (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-motion@2.9.0_react-dom@17.0.2_react@17.0.2\node_modules\rc-motion\lib\DomWrapper.js:20:34)
    at C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-motion@2.9.0_react-dom@17.0.2_react@17.0.2\node_modules\rc-motion\lib\CSSMotion.js:41:32
    at C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-trigger@5.3.4_react-dom@17.0.2_react@17.0.2\node_modules\rc-trigger\lib\Popup\PopupInner.js:35:23
    at div
    at C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-trigger@5.3.4_react-dom@17.0.2_react@17.0.2\node_modules\rc-trigger\lib\Popup\index.js:32:22
    at C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-util@5.38.0_react-dom@17.0.2_react@17.0.2\node_modules\rc-util\lib\Portal.js:12:25
    at Trigger (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-trigger@5.3.4_react-dom@17.0.2_react@17.0.2\node_modules\rc-trigger\lib\index.js:82:36)
    at Dropdown (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\rc-dropdown@4.0.1_react-dom@17.0.2_react@17.0.2\node_modules\rc-dropdown\lib\Dropdown.js:33:28)
    at Dropdown (C:\Users\kgetz\Work\event-viewer\common\temp\node_modules\.pnpm\antd@4.24.15_react-dom@17.0.2_react@17.0.2\node_modules\antd\lib\dropdown\dropdown.js:30:33)

Glancing at the other open issues, it seems similar to #23.

Start by reproducing the Ant Design 4.x dropdown interaction in a unit test and inspect the warning stack at rc-overflow/lib/Overflow.js. Compare the behavior with issue #23, then verify that closing or unmounting the dropdown no longer produces the React state-update warning.