Accepted answer

It looks like the temp.Info[item] and temp.Resources[item] lines are mutating the existing state. You've made a shallow copy of the top level, but aren't correctly copying the second level. See the Immutable Update Patterns page in the Redux docs for an explanation of why this is an issue and what to do instead.

You might want to try using the immer library to simplify your immutable update logic. Also, our new redux-starter-kit library uses Immer internally.

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