storeToRefs and reactive() in setup store

[Tim-OuY]

Code Example: https://stackblitz.com/edit/vue-pinia-store-state-reactivity-7wgfwu?file=src%2FApp.vue

Directly change state.properties with useStore() instance will break reactivity of storeToRefs(), However, objects defined by reactive() can actually change directly and still keep the reactivity (eg. reactiveArray in this case).

Is it by design or is there a bug?

[posva]

This is by design as reactive objects cannot be replaced