Double-clicking a dense Reflex scatter chart can blank the plot

[amsraman]

Screen.Recording.2026-07-17.at.1.10.14.PM.mov

Summary

Double-clicking the rendered scatter chart from its initial viewport causes the plot area to go dark/blank instead of preserving or resetting the chart view.

This was observed in a Reflex app using reflex-xy with a dense, state-backed scatter chart.

Reproduction

1. Render the chart below and wait for the initial global scatter view to appear.
2. Without first panning or zooming, double-click the chart from the initial entry/default view.
3. Observe that the rendered plot goes dark.

Minimal usage from the application

@reflex_xy.figure
def atlas(self) -> xy.Chart:
    d = _events()
    mask = d["mag"] >= self.min_mag
    return xy.scatter_chart(
        xy.scatter(
            d["lon"][mask],
            d["lat"][mask],
            color=d["depth"][mask],
            size=np.clip((d["mag"][mask] + 2.2) * 1.35, 2, 11),
            color_domain=(0, 250),
            colormap="plasma",
            opacity=.78,
            density=True,
        ),
        xy.x_axis(label="LONGITUDE", domain=(-180, 180), tick_count=7),
        xy.y_axis(label="LATITUDE", domain=(-90, 90), tick_count=5),
        width="100%",
        height=430,
    )

reflex_xy.chart(
    State.atlas,
    on_point_hover=State.on_hover,
    on_select_end=State.on_select,
    height="430px",
    id="atlas",
)

The dataset contains approximately 10,641 points. Longitude and latitude have explicit fixed domains, while color and point size are array-valued.

Observed behavior

After the double-click, the plot rendering becomes dark/blank and the data points are no longer visible.

Expected behavior

A double-click should either:

• leave the initial view unchanged; or
• perform a documented zoom/reset interaction while continuing to render the data.

It should not blank the plot.

Video

Video to be added by the reporter.

Environment

• reflex-xy 0.1.0
• Reflex 0.9.7
• macOS
• Dense scatter with density=True
• State-backed chart via @reflex_xy.figure

[masenf]

fixed with recent scatter/density work