WARNING！！！
Never set this picture as wallpaper, especially for Samsung mobile phone users!
It will cause your phone to crash!
Don't try it!
If someone sends you this picture, please ignore it. pic.twitter.com/rVbozJdhkL

After digging into getHistogram for both devices, and the functions calling getHistogram... I noticed this.

The first image is from the Pixel 3 XL, while the second is from the Pixel 4 XL.

On the Pixel 4 XL, there's a new parameter for the function peekWallpaperBitmap. pic.twitter.com/gKaRz8fUEv