Memory management issues are the latest problem with the 2018 Pixels : The Pixel 3 and Pixel 3 XL could have an issue with multitasking. The new models have the same 4GB of RAM used on the first-gen Pixel and subsequent versions of the handset. Some users are complaining that they can’t keep more than three apps active in the background at a time. On Reddit, quite a few Pixel 3 and Pixel 3 XL owners state that their phone needs to redraw apps constantly. Others say that every time they take a picture, an app in the background is shut.
While some shout that the 2018 Pixels should have been stuffed with 6GB or even 8GB of RAM, many wonder if the problem lies elsewhere, like with the battery management system used on Android 9 Pie. For example, the Adaptive Battery feature learns which apps you use often and those you don’t use frequently are closed once you’re done with it. If you’re suffering through this issue, try disabling Adaptive Battery to see if there is a difference.