Incomplete data from Upstox

Hello Upstox Team , why dont you give the Prev Close value & oi change correctly here and at 3.30 there is a closing price and at 4.00 pm another closing price why this way??
{
“type”: “live_feed”,
“feeds”: {
“NSE_FO|45450”: {
“fullFeed”: {
“marketFF”: {
“ltpc”: {
“ltp”: 213.75,
“ltt”: “1740727891235”,
“ltq”: “150”,
“cp”: 494.05
},
“marketLevel”: {
“bidAskQuote”: [
{
“bidQ”: “75”,
“bidP”: 213.45,
“askQ”: “525”,
“askP”: 213.9
},
{
“bidQ”: “225”,
“bidP”: 213.3,
“askQ”: “150”,
“askP”: 213.95
},
{
“bidQ”: “150”,
“bidP”: 213.25,
“askQ”: “75”,
“askP”: 214
},
{
“bidQ”: “150”,
“bidP”: 213.2,
“askQ”: “225”,
“askP”: 214.05
},
{
“bidQ”: “225”,
“bidP”: 213.1,
“askQ”: “75”,
“askP”: 214.1
}
]
},
“optionGreeks”: {
“delta”: 0.4952,
“theta”: -8.4067,
“gamma”: 0.0007,
“vega”: 16.769,
“rho”: 3.8673
},
“marketOHLC”: {
“ohlc”: [
{
“interval”: “1d”,
“open”: 400,
“high”: 400,
“low”: 208.7,
“close”: 213.75,
“vol”: “779400”,
“ts”: “1740681000000”
},
{
“interval”: “I1”,
“open”: 210,
“high”: 212.8,
“low”: 208.7,
“close”: 212.15,
“vol”: “8475”,
“ts”: “1740727800000”
}
]
},
“atp”: 272.9,
“vtt”: “779625”,
“oi”: 210000,
“iv”: 0.131378173828125,
“tbq”: 46050,
“tsq”: 41850
}
}
}
},
“currentTs”: “1740727891739”
}