useMutation response vs MutationCache

[baeharam]

I'm using useMutation to get requestId like below.

const mutationResponse = useMutation(...);
const requestId = mutationResponse.data?.requestId ?? "";

and use reuqestId to enable useQuery.

const someQuery = useQuery(..., { enabled: !!requestId });

However, when I re-render component, response of useMutation is different at every rendering. But, when I log queryClient.getMutationCache(), it has requestId.

console.log(mutationResponse.data?.requestId); // undefined or specific request id
console.log(queryClient.getMutationCache()); // always has a specific request id

From this point, why mutation response is different at every rendering? Mutation is executed only once at component mounting. It doesn't executed at every rendering.

Thanks for reading my question! 🙇‍♂️

[TkDodo]

From this point, why mutation response is different at every rendering?

it shouldn't be. can you show a codesandbox reproduction?