I got it this is not an unauthorised txn but it is a reversal of cashback for the failed txn. Cashback was not reversed last month so I believe they are adjusting the cashback now for failed txns.
There was an unauthorised txn of 392 done from my cc today. Didn't receive any notification or something. Got to know when I opened the app. Have blocked the card for now and will raise it to their support.