custom Directory not working

[yashphy]

Here is my configuration file.
{
"Global": {
"Chroot": {
"Directory": "%h",
"StartPath": "sftp"
},
"Directories": ["sftp"]
},
"Users": [
{
"Username": "demo",
"Password": "demo"
},
{
"Username": "test",
"Password": "test1234",
"Chroot": {
"Directory": "/data/assets",
"StartPath": "sftp"
}
}
]
}

FYI following works:

{
"Global": {
"Chroot": {
"Directory": "%h",
"StartPath": "sftp"
},
"Directories": ["sftp"]
},
"Users": [
{
"Username": "demo",
"Password": "demo"
},
{

        "Username": "test",
        "Password": "test1234",
        "Chroot": {
            "Directory": "/data",
            "StartPath": "assets"
    }
    }
]

}

I want to make. base directory as /data/assets not /data

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