When swapping the value ​​of textLeft and textRight, I get different results

[TianZhH]

This is my code:

package main

import (
	"encoding/json"
	"fmt"
	diff "github.com/yudai/gojsondiff"
	"github.com/yudai/gojsondiff/formatter"
)

func main() {
	textLeft := `{
    "name": "text_left",
    "strategy_list": [
        {
            "percent": 100,
            "whitelist": [
                "aabb"
            ],
            "name": "策略1",
            "stra_id": 11
        }
    ]
}`

	textRight := `{
    "business_id": 3,
    "name": "text_right",
    "desc": "text_right desc",
    "strategy_list": [
        {
            "percent": 50,
            "whitelist": null,
            "name": "stra_1",
            "stra_id": 1
        },
        {
            "percent": 50,
            "whitelist": null,
            "name": "stra_2",
            "stra_id": 2
        }
    ]
}`

	// textLeft, textRight = textRight, textLeft
	differ := diff.New()
	d, err := differ.Compare([]byte(textLeft), []byte(textRight))
	if err != nil {
		return
	}

	config := formatter.AsciiFormatterConfig{ShowArrayIndex: true, Coloring: true}

	var aJson map[string]interface{}
	_ = json.Unmarshal([]byte(textLeft), &aJson)
	f := formatter.NewAsciiFormatter(aJson, config)
	result, err := f.Format(d)
	if err != nil {
		return
	}

	println(fmt.Sprintf("result=%s", result))
}

The result is like this

But when I swapped textLeft and textRight, the result became like this

// swap textLeft and textRight before diff.New()
textLeft, textRight = textRight, textLeft

I think the second result is crorrect.
The first result is missing the original content of leftText