From a user through the Android support email:

When I click on an image in the App, and add an Image Caption, mostly the saved Caption will show with the image as it should, but sometimes it doesn't.

When I check a week later, still no change. When I on the menu and then "Image page", the Caption is always there.

Can something be done to fix this issue?

Example:
The Raft of the Medusa (English Wikipedia page):

Image descriptions on the page (Image Captions saved, but not appearing):

• Plan of the Medusa's raft at the moment of its crew's rescue
• Cannibalism on the Raft of the Medusa, crayon, ink wash, and gouache on paper, 28 cm × 38 cm, Louvre
• Michelangelo. Detail of The Last Judgment in the Sistine Chapel
• In 1820, Géricault successfully exhibited the painting in the Egyptian Hall in Piccadilly, London

Best regards,