The tool, turf/difference, returns values that are not expected when calculating a MultiPolygon.

[SuperHuZhiPeng]

const multiPolygonGeoJSON = {
"id": "9",
"type": "Feature",
"properties": {
"新建字段": "",
"smpid": 9
},
"geometry": {
"coordinates": [
[
[
[
49.94211569413164,
29.497541277856367
],
[
28.839551278389223,
26.957278826405524
],
[
48.02842756439971,
17.73505748354385
],
[
59.348351446407186,
17.55062860328698
],
[
49.94211569413164,
29.497541277856367
]
]
],
[
[
[
49.94211569413164,
29.497541277856367
],
[
59.348351446407186,
17.55062860328698
],
[
95.16631931047093,
16.96706746143657
],
[
95.16631931047093,
34.94149321090467
],
[
49.94211569413164,
29.497541277856367
]
],
[
[
73.32892322956478,
27.118799174695646
],
[
86.67896551247556,
26.957195952981486
],
[
76.0673934414454,
21.509241571951947
],
[
73.32892322956478,
27.118799174695646
]
]
],
[
[
[
100.02900779538633,
13.500447286364128
],
[
102.76747800726697,
7.89088968362029
],
[
113.37905007829713,
13.338844064649983
],
[
100.02900779538633,
13.500447286364128
]
]
]
],
"type": "MultiPolygon"
}
}
const feature = this.newFeature(multiPolygonGeoJSON )
this.addFeature(feature )

After adding this MultiPolygon feature to the map, I drew a feature and used the difference tool between this feature and the MultiPolygon feature. The expected result should be a feature of type MultiPolygon, but instead, the returned feature is of type Polygon, and it has one less line compared to the MultiPolygon feature.