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The lane was mounted inside the property-lanes wrapper, which renders only for a track's GSAP keyframe clip — so an audio clip with no tween resolved to nothing: no disclosure caret, no reserved height, no lanes. Verified on a composition with one `<audio>`, an envelope, and no tweens anywhere: 0 carets, 0 lanes. The attribute still wrote and the render still baked it, so the feature failed silently for exactly the tracks it exists for. Same composition now: 1 caret, and expanding it draws the Volume lane. Automation counts as something to disclose. `resolveTrackKeyframeClip` takes a counter alongside the keyframe lane counts and qualifies a clip on either; the header asks the same counter about the clip it already holds. A function rather than another map threaded through the props: every caller then reads one cached parse, so the height a row reserves and the lanes drawn in it cannot drift apart. That drift is also fixed for the lane's own offset, which passed the raw tween count where every other consumer uses distinct property groups. Two tweens on one property drew one keyframe lane but pushed the automation lane down by two, spilling into the next track; one tween on two properties did the inverse and drew it over a diamond lane, stealing its pointer events. It now reads the same `laneCounts` map the reserved height and the drawn lanes use. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>