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This change must be made to the editors draft drawFocusIfNeeded: http://www.w3.org/html/wg/drafts/2dcontext/html5_canvas_CR/#dom-context-2d-drawfocusifneeded <change> If the focus area is not on the screen, then scroll the focus outline into view by aligning it to the top when it receives focus. </change> <to> If the focus area is not on the screen, then scroll the focus outline into view. </to>
Change was made at https://github.com/w3c/html/commit/cff56d6a7c26c95f48bb695e3a5e30c69e7ddd23 It says: [[ If the focus area is not on the screen, then scroll the focus outline into view when it receives focus. ]] which I believes addressed this issue. The editor's draft hasn't been regenerated yet unfortunately.
This has been resolved in http://www.w3.org/TR/2015/WD-2dcontext-20150514/