Duplicate posts blank spaces

[joshua-davis-rose]

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• You've discussed making your changes with a member of the dev team per contributing rules in the README
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• You've tested your changes

Summary

Please provide a summary of what your PR does

When scrolling, occasionally you'd get a repeated page of posts. After scrolling another page you'd see new content again. However, as it turns out there was a missing page in there that you never saw. This also caused collisions with the unique identifiers FlashList uses so you'd get blank spaces in the scroll view.

Screenshots

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Nothing new to see.

Test Plan

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Scroll. Scroll fast. Scroll slow. Upvote a post and keep an eye on anything that might get repeated. Look for gaps in the feed.