https://wccftech.com/google-pixel-c-android-8-1/

Google recently released Android 8.1, which brings new features and improvements to compatible Google devices. Basically, the new features that come with the version 8.1 are the ones that the company introduced on the Pixel 2 lineup. Among all the Google devices that received Android 8.1, Pixel C also got the update, but instead of bringing new features aboard, the update turned out to be a disaster for some users as it triggered factory reset after the installation.

The bug that caused the fury was common among the units that received the update in the first phase. Thankfully, the second phase of the update did not cause the issue. According to a post on Google’s product forum from the community manager Orrin, the issue has been fixed. In the post, he also mentioned that by resetting the device, users will be able to restore the backup if the automatic backup feature was on. He also inserted the link to a Google support page that gives step-by-step instruction for resetting the device – follow this link.