Help with fetching Unherd articles

I am using Unherd RSS feed from here:

https://unherd.com/feed/

and it works for most articles, but there are some oddities with quote characters.
With this story, all quotes render fine:

https://unherd.com/2025/03/how-safe-...letby-verdict/

With this one, they are garbled:

https://unherd.com/2025/03/germanys-...ot-for-russia/

What would explain this behaviour and what can I do to fix it?

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