<ul><li>Google confirms a technical issue caused the deletion of Timeline data for some users.</li><li>Only users with backups turned on will be able to restore their Timelines.</li><li>Google recently switched to on-device storage for Timeline data, and backups are not enabled by default.</li><li>Some users lost years' worth of location history and were not able to recover all data even after importing their backups.</li></ul>

Google says a technical issue caused some users’ Maps Timeline data to be deleted

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