Finally much waiting and many developer preview evaluation builds, Google has declared the Android Oreo update with Android version 8.0. The update was made available for download for a variety of both Pixel and Nexus devices, and if you are someone like us, the odds are that you have previously installed the Oreo update in your own compatible Android device. In this guide, we will help you to Downgrade From Android Oreo to Nougat.
But as is always true with lately released software updates, they’re not 100% Nominal. And even when these builds are liberated of issues, there are always possibilities of incompatibility with programs on your own phone because newer Android versions frequently bring newer APIs and deprecate a few of the previous ones, making some programs incompatible with the latest Android release.

If you already have installed Android Oreo update, you may face issues with the newest version of Android. You may want to consider downgrading from Android Oreo into Nougat (7.1.2) onto your Pixel or even Nexus device.
sailfish = pixel
marlin = pixel xl
guess u got to fix that