Receiving empty response in breakdown field for Mobile segment in report, api 1.4 version

Sometimes i receive empty data in breakdown field in report, it only happens in Mobile segment, whereas in Computer segment i am receiving proper data. I am using api 1.4, is there any reason for it?

"segments": [
{
"id": "---",
"name": "Mobile"
}
],
"data": [
{
"name": "Wed. 13 Mar. 2024",
"year": 2024,
"month": 3,
"day": 13,
"breakdown": [],
"breakdownTotal": [
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
]
}
],
"totals": [
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0",
"0"
],
"version": "1.4.18.10"
},
"waitSeconds": 0,
"runSeconds": 0
}