Changing timestamp doesn't update topic list on front page

It registers the ‘right’ time in the topic but on the list of posts on the front page (category view as primary) it says the old timestamp:

Wrong:

Right:

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Maybe something for you to look at @tgxworld since it relates to manual changing of post times?

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Confirmed and fixed in

https://github.com/discourse/discourse/pull/3863

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The pull request has been merged.