When you place an item frame, and slowly move your cusor into the sky, the item frames disappear. This is not a F1 only bug, I just enabled F1 so it'd be more clear to see.
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This could be a duplicate. But after 5 minutes of searching whether this would be a duplicate I stopped searching. Took me too long.
The Item Frame doesnt render.
Its not a bug
You can do it with all mobs