I have a Pixel 6, and have the application "Fate/Grand Order" installed. On an earlier version of Android 12, the game would remain opened in the background, when the application was switched. That means, when I returned to it after e.g. looking something up on Chrome, the game would remain loaded, ready to proceed.
However, after updating Android 12 (not the game itself), the application would immediately close when switching to a different application. Returning to the game will cause it to start from the beginning.
How can I force Android to keep the game loaded in the background?
What I've tried
I have read in several sources that setting an app's battery usage to "Unrestricted" will cause the application to remain open in the background. I tried that, but the behavior did not change.
For information, my Pixel 6 has 8GB of RAM, and the developer options show that only 4.8 GB are used on average. So I highly doubt that the application is being closed out of a lack of RAM. Furthermore, Fate/Grand Order only requires 242 MB of RAM, while Chrome needs 337 MB.