Two-way binding within an #each over a store property breaks reactivity

[nosideeffects]

Describe the bug
Binding to a property of an #each block item does not initiate a re-render when the property is updated, if the list being looped over is within a store. The same logic using a value outside of a store works as expected.

To Reproduce
Example in REPL

Expected behavior
I would expect the store version to mimic the behaviour of the non-store version.

Information about your Svelte project:

• Firefox 78.0.1
• Svelte 3.24.1
• Rollup

Severity
Can be worked around easily in most scenarios, once you understand that reactivity works as expected if you do not use a store value.

[Conduitry]

This is fixed in 3.25.0 - https://svelte.dev/repl/9f9b65e8d0e6442e9ad559e7eaecfd0d?version=3.25.0