`binding_property_non_reactive` warning for svelte store

[macmillen]

Describe the bug

I have a writable store in runes mode and want to bind to a nested property from another component. However what happens is that I get a binding_property_non_reactive warning and the value doesn't change even though it's $bindable.

How can I fix or workaround that problem?

<script>
  import Component from "./Component.svelte";
  import { writable } from "svelte/store";

  let form = writable({ priceRules: [{ posCheckboxes: { all: false } }] });
</script>

<Component bind:posCheckboxes={$form.priceRules[0].posCheckboxes} />

Reproduction

https://svelte.dev/playground/b9e6d012d1c6463faf02e1ec7726117c?version=5.34.6

Logs

[svelte] binding_property_non_reactive
`bind:checked={posCheckboxes.all}` (Component.svelte:6:23) is binding to a non-reactive property
https://svelte.dev/e/binding_property_non_reactive

System Info

System:
    OS: Linux 6.11 Ubuntu 24.04.2 LTS 24.04.2 LTS (Noble Numbat)
    CPU: (16) x64 12th Gen Intel(R) Core(TM) i5-12500H
    Memory: 16.42 GB / 31.02 GB
    Container: Yes
    Shell: 5.9 - /usr/bin/zsh
  Binaries:
    Node: 22.11.0 - /run/user/1000/fnm_multishells/4071_1750663754110/bin/node
    npm: 10.9.0 - /run/user/1000/fnm_multishells/4071_1750663754110/bin/npm
    pnpm: 9.12.3 - /run/user/1000/fnm_multishells/4071_1750663754110/bin/pnpm
  Browsers:
    Brave Browser: 137.1.79.126
    Chrome: 133.0.6943.126
    Chromium: 137.0.7151.103

Severity

blocking an upgrade

[brunnerh]

Sounds like a duplicate of:

• Binding a nested writable $store value doesn't work #13914