Running in safe mode doesn’t appear to fix it and it could be related to using Wi-Fi. The issue appears to be completely random and happens when the phone is not in use. It wouldn’t be a Pixel launch if users weren’t already having problems, and unfortunately, it only took a couple of weeks for users to encounter their first issue with the Pixel 3a series. The bug could be related to using Wi-Fi. Some users on Reddit are now reporting that their Pixel 3a and 3a XL are randomly shutting down. Instead, you’ll have to hold down the power button for 30 seconds in order to make the phone boot back up. The issue appears to be… When a shutdown does occur, the screen refuses to turn on with a press of the power button. So far, there doesn’t seem to be any rhyme or reason to why the phones are shutting down. What you need to know
Some users are experiencing random shut downs on both the Pixel 3a and Pixel 3a XL. At the moment, there has been no official statement from Google on the matter.