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Miguel Angel Simon Sierra
d48440a9ba
The sub-composition drill-in replaced the host row with its children. Since expansion is also driven by the playhead alone (paused auto-expand), an ordinary seek into a sub-composition made the host row disappear, taking its keyframe lane with it: diamonds render per row from keyframeCache.get( elementKey), so no row means no diamonds. Reproduced live with no drag at all, seek 0 gave 3 diamonds, seek 7.68 gave 0, seek 0.2 gave 3. Make the expansion additive instead. The host row stays and its children are appended directly below it. The synthetic fractional lanes already used for children sit strictly between the host's lane and the next integer, so the host keeps its own row without colliding with anything. The time-keyed auto-expand itself is unchanged.