WritableComputedRef Deep Setter not working

[moritzmla]

Hello,

imagine this:

<template>
  <input v-model="human.firstName" />
  <input v-model="human.lastName" />
</template>

<script setup lang="ts">

interface Human {
    firstName: string;
    lastName: string;
}

const human = computed<Human>({
    get: () => reader.read(),
    set: (value) => writer.write(value)
});

</script>

when i type into <input ... /> the computed setter is not being triggered.

Has anyone an idea why?