Smart Meter - Stupid Gas consumption

Hi. I had a smart meter installed last Friday. All seemed to be working fine until 12.16am on Sunday morning when I noticed that the IHD was showing the gas consumption was £2.41 so far today. I’m assuming that the day starts at midnight. I only have heating and hob that is gas but neither of those were in use during those 16 minutes. In the days prior the consumption hadn’t even reached that level for a whole day even when the heating was on! It’s not a good start!