I faced this frequently so I reported this. They picked the vehicle, flashed the software (my assumption) and after testing they gave back the vehicle. If you are facing this regularly I recommend reporting the issue.
I don’t know what they exactly did because when I asked they said we cannot give service report as it is done under warranty. Although we even don’t give report to nonwarranty vehicles too except the invoice. This is what answer I received. But I don’t want to argue with them knowing their response so I tested it is working fine so didn’t bother about what they resolved.