This is cool. It seems hard to add just dots to signature? It may be some kind of delay waiting for a touch action.

This was surprisingly tricky, but fixed! The issue was that short tap strokes were being fed through the stroke-rendering library (perfect-freehand), which applies start/end taper over a configurable length. When the total stroke distance is shorter than the combined taper length, the stroke tapers to nothing — so dots just disappeared. The fix detects tap-like strokes and renders them directly as small ellipses, bypassing the stroke pipeline.