When useFormStore is in a seperate file, it fails

[otherjohn]

I am pretty sure this is an error on my part and not a bug.

when I have useFormStore in a component class, it works fine.
app.tsx

export const MortgageCalculator = ({
  rate
}: {
  rate?: string
}) => {
const calculatorForm = useFormStore<Inputs>({
    initialValues: inputInitialValues
  }); 
  // ... no errors and app runs fine.

But if I move the useFormStore to a store.ts file, I get the following error:
Uncaught TypeError: Cannot read properties of undefined (reading '__H') which looks like it
is triggered from useFormStore and something with preact/hooks

store.ts

const calculatorForm = useFormStore<Inputs>({
  initialValues: inputInitialValues
});
const breakdownSignal = useDeepSignal(breakdownInitialValues as Results)

const state = {calculatorForm, breakdownSignal};
export const useCalculatorStore = () => state;

and use it in the component like so:

app.tsx

export const MortgageCalculator = ({
  rate
}: {
  rate?: string
}) => {
const { calculatorForm, breakdownSignal } =  useCalculatorStore();
//... 

I am pretty sure this has something to so with my coding. Any help pointing out what I am doing wrong is very appreciated.

[fabian-hiller]

This is probably related to Preact. I recommend creating a issue there. I have never heard of this error and don't know what it is related to. Feel free to link me so I can help if necessary.