useStoreRehydrated always returning true?

[GollyJer]

For some reason useStoreRehydrated returns true even though it isn't.

I'm using

const isRehydrated = useStoreRehydrated();
console.log('isRehydrated', isRehydrated);
if (!isRehydrated) return null;

to protect the App from loading until state is rehydrated.

But this console logs isRehydrated true even on the first run and I can see the App render with empty data and then rerender with rehydrated data a second later.

Not sure what to check next. Thanks for any help!