Historical Data API returning empty candles for CDS (currency derivatives) segment

Hi, I'm using Kite Connect (Python kiteconnect SDK) with a live, working session — kite.quote() and kite.historical_data() both work correctly for NSE equity instruments.

I'm now trying to pull historical 5-minute candles for NSE Currency Derivatives (CDS segment) — specifically USDINR near-month futures. Here's what I've confirmed:

kite.instruments("CDS") correctly returns the instrument list, and I can resolve a valid instrument_token for USDINR's near-month FUT contract (e.g. token 265731).
kite.quote([265731]) works and returns a correct live LTP.
kite.historical_data(265731, from_date, to_date, "5minute") returns an empty list — no error, no exception, just [] — for a 2-day lookback window that definitely includes trading sessions.

The same historical_data() call pattern works fine for NSE equity tokens on the same API key/session, so this looks specific to the CDS segment rather than a general historical-data permission issue.

Question: Does the Historical Data API subscription need to be separately enabled/scoped for the CDS (currency derivatives) segment, or is there a different parameter needed for currency futures specifically? Is CDS historical data included in the standard Historical Data add-on, or does it require something else?

Any pointers on where to check/enable this in the Kite Connect developer console would be appreciated.

Note : Asking specifically whether it's a subscription-scope issue or a platform-wide limitation