No longer able to detect when hovering ends

[mitchwilliamson]

Description

After updating to 8.1.10 our tooltip logic appears to no longer function. We use a similar method to the tooltip example from the docs. Previously we could detect the mouse leaving a point by checking if the picking info .object property is defined. After updating it appears that this is no longer the case as onHover isn't called with an empty object.

I've used the example code from the link above and it also appears to no longer function correctly.

Downgrading to 8.1.9 fixes the issue, so it may be related to #4685?

Repro Steps

    const layer = new ScatterplotLayer({
      data: [{ position: [-122.45, 37.78], message: 'Hover over me' }],
      getPosition: d => d.position,
      getRadius: 1000,
      getFillColor: [255, 255, 0],
      pickable: true,
      onHover: info => console.log(info.object ? 'hovering' : 'left')
    });

1. Hover over the circle.
2. Leave the circle.
3. left is never logged.

My output on v8.1.9

hovering
left

My output on v8.1.10

hovering

Environment (please complete the following information):

• deck.gl 8.1.10
• Browser Version: Electron 8.3.2 (Chrome 80)
• OS: Windows 10

[Pessimistress]

Try 8.1.11

[mitchwilliamson]

It works fine again in 8.1.11, thanks!