I have an ultrawide 21:9 monitor (43:18 technically), and when scrolling through the horizontal demo it visibly snaps the red div back to the left when about 1/3rd of the pink div is still visible.
Display resolution: 3440x1440
Chrome version 58.0.3029.96 (64-bit)
Windows 10 64-bit
I have an ultrawide 21:9 monitor (43:18 technically), and when scrolling through the horizontal demo it visibly snaps the red div back to the left when about 1/3rd of the pink div is still visible.
Display resolution: 3440x1440 Chrome version 58.0.3029.96 (64-bit) Windows 10 64-bit