@turf/isobands generates wrong inner circle

I'm trying to use isobands, but sometime got incorrect result.
Example:
Cyan (985) polygon expected to be one polygon with hole, but it generated two polygons without holes.

Grid points:

Code for reproduce:

  fetch("../point.json")
      .then((res) => res.text())
      .then((text) => {
        const pointGrid = JSON.parse(text);
        const breaks = [
          965, 970, 975, 980, 985, 990, 995, 1000, 1005, 1010, 1015, 1020, 1025,
          1030, 1035, 1040,
        ];
        let result = turf.isobands(pointGrid, breaks, {
          zProperty: "value",
        });
        console.log(result);
      });

If manualy replace two polygons with one, it turns out well.

 result.features[4].geometry.coordinates = [[result.features[4].geometry.coordinates[1][0], result.features[4].geometry.coordinates[0][0]]]    

My raw data attached
point.json
isobands.json

Start at the turf.isobands entry point and reproduce the report with the attached point.json and breaks array; compare the generated isobands.json with the screenshots and stated expected geometry. Trace how the 985 band is assembled, and consider the issue done when that band is one polygon with an inner hole without manual coordinate replacement and the other bands remain correct.