The two-or-more-finger scroll path measured its centroid across a VARYING
pointer count: real fingers never land (or lift) in the same input frame, so
the 2→3 transition moved the centroid far past SCROLL_DIV, emitted a phantom
wheel tick to the host, and set `moved` — which disqualified the not-moved tap
classification and made the advertised 3-finger stats-cycle tap unreachable on
real hardware (two-finger right-click survived only because its anchor never
crossed a count change). Re-anchor whenever the finger count changes; genuine
two-finger scrolling is measured between same-count frames exactly as before.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
enricobuehler
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