Update. Last time I opened the file was January 17th. Anyone have an idea what might have happened?

Hey there!   World Anvil does not remove anything at any point - make sure your articles are not in another world or another account. This is will 100/100 certainty not a bug or an issue. It was never reported or reproduced in the 7 years of the proejct :) -- Having misplaced them has happened a lot though :)

Note:   Xera (4480bddd-c98d-4392-90a7-efd3b3d58b24) is a private world that never had over 7 articles (including deleted) .