at 9:16 AM on 7th Feb, 2020 the following call to find day open value of NIFTY20FEBFUT returned 12131 and evening 7 PM it returned 12132.35. I have observed the same for min level or other higher timeframe that the value probed immediately after the candle closing of the candle is different than probed after some time. Does it take some time to settle recent candle values?
You can have look to this thread.