Steps: Apply the background images as attached demo. Make sure it can be displayed in one single screen, and there is no scrolling bar appeared. Expected Result: The background position is calulated correctly. Actual Result: There is 1 px background shift for the inner element.
Created attachment 105195 [details] Demo for reproducing the bug
Confirmed on ToT Chromium Linux and Safari Mac. None of the other browsers are showing the 1px shift.