Option Chain Volume data not matching with NSE

I am totally confused agaisnt volume data from APp and NSE website.

Even i comaored all other brokers app.

Why volume data is different in option chain as comapre to NSE website.
This is todays NIFTY50 data.

@nikita_malusare Could you clarify what you are comparing to? Do you mean the Mobile app or the Web app? If yes, please provide a screenshot.

Or are you referring to the Upstox API?

I am refferrting to API , Mobile app and Web all 3.

Just open Option chain from NSE website and Optino chain from Upstox ( Any way like API or App )
.
Now compare values .
OI is matchin but volume data is totaly differnt.

Because of this glitch i made huge losss.

Screenshots are already attached plz check.
volume is 2.5 CR for strike price 24900 and in NSE its just 970669.

remaining columns values are matching but not volume value.

If you want video i can upload here.

I am refferrting to API , Mobile app and Web all 3.

Just open Option chain from NSE website and Optino chain from Upstox ( Any way like API or App )
.
Now compare values .
OI is matchin but volume data is totaly differnt.

Because of this glitch i made huge losss.

Screenshots are already attached plz check.
volume is 2.5 CR for strike price 24900 and in NSE its just 970669.

remaining columns values are matching but not volume value.

If you want video i can upload here.