addCandlestickSeries custom type formatter issue

[KAEN7]

Describe the bug

The decimal fraction of the values in the chart corresponding to the y-axis is not regular.
ex) 1.4200, 1.32, 1.2200 ...

This is a formatter that applies logic that cuts the decimal point. We checked that the input and output values are output normally.

However, the priceFormat function within the addCandlestickSeries indicates an irregular decimal length.

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To Reproduce

// LWchart.tsx

<Chart
  options={options}
  candlestickSeries={[{ data: chart }]}
  autoWidth
  height={380}
  onCrosshairMove={(param) => handleCrosshairMoved(param, chart[chart.length - 1])}
  chartRef={(chart) => {
  chart.timeScale().fitContent();
  // chart.timeScale().scrollToPosition(2, true);
  chart.addCandlestickSeries({
	  priceFormat: {
		  type: "custom",
		  formatter: (priceValue) => {
			  return decimalSplit(priceValue);
		  },
		  minMove: 0.0000000001,
	  },
  });
  }}
/>

// decimalSplit.ts
export const decimalSplit = (value: string | number) => {
	// return value;

	if (!value) return "0";
	const splitStr = String(value).split(".");
	if (!splitStr[1]) return splitStr[0];

	if (Number(splitStr[0]) > 10) {
		return `${splitStr[0]}.${splitStr[1].slice(0, 2)}`;
	} else if (Number(splitStr[0]) > 0) {
		return `${splitStr[0]}.${splitStr[1].slice(0, 4)}`;
	} else {
		return `${splitStr[0]}.${splitStr[1].slice(0, 8)}`;
	}
};

Github code => https://github.com/perifinance/peri.dex/blob/main/src/screens/Chart/LWchart.tsx

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Expected behavior

The values on the y-axis must be numbers of regular length

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Screenshots

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Additional context

There was no problem with the input output value through the logic I made myself.
An issue occurs in the view group only through priceFormat.