setting default value in useForm

const {
formProps,
saveButtonProps,
queryResult,
form,
redirect,
onFinish,
...rest
} = useForm<User>({
action: 'edit',
successNotification: {
message: 'User updated successfully!',
type: 'success',
},
defaultFormValues: {
isBetaUser: false,
},
redirect: 'show',
warnWhenUnsavedChanges: true,
});

why does my defaultFormValues overwrite the value once the edit query finishes?