I have subscribed to RELIANCE OR ICICI data in full mode and I see many times ticks repeating. However , I did not observe same with Futures data. I get same times stamp data for 10-15 ticks few time few times only couple of time.
You will receive tick data whenever there is a change in any of the fields. The snapshot can be exactly the same as the previous one and only one of the values must have changed. We just stream whatever we get, we don't publish ticks on our own.