Incorrect tileset height when providing position via REST api

Hi, I’m using the rest api to upload laz file.
When setting the position in options, the height is not the same in the asset. The coordinates are ok though.
My code is :

const response = await request({
        url: '',
        method: 'POST',
        headers: { Authorization: `Bearer ${accessToken}` },
        json: true,
        body: {
            name: filename,
            description: 'See [Wikipedia](',
            type: '3DTILES',
            options: {
                position:[ 2.29, 48.85, 0],
                sourceType: srcType,
                // clampToTerrain: true,
                // baseTerrainId: 1

As you can see, I have position:[ lat,long,height], with height = 0.
But when the assets is created in cesium the height is always 267,7539012804.
What am I doing wrong ?