Some days ago, Google confirmed indexing problems. Sites dropped out of Google’s index for no reason. This was an error and Google tried to fix the problem:
The indexing issue should be almost completely resolved within the next eight hours. Some documents might take an additional 12-24 hours to restore. We'll provide a further update when the issue is fully resolved.
— Google SearchLiaison (@searchliaison) April 9, 2019
Update: Google has published a final confirmation:
The indexing issue has now been fully resolved. We apologize for the inconvenience. We appreciate your patience as we restored normal operation.
— Google SearchLiaison (@searchliaison) April 11, 2019
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