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Description
Currently the target-size rule treats elements with position: stricky as though they have position:relative. This could in theory result in false positives when the page is scrolled. I think the best solve for this would be to try and work out the original position of the sticky element and use that as its place in axe._grid, rather than its current position.
In this, we may also want to revisit how position: fixed elements are calculated. Those too have this issue. We have exception code in color-contrast and target-size to try and avoid false positives from them, but I think there's probably a better / more reliable solution if we adjusted how the grid worked.