Calories

My Vivoactive 5 usually counts calories from recorded activities in my active calories along with the calories burned from general every day movement. It has stopped doing that. So today it shows my active calories as 400, but it also says that I’ve burnt 600 doing a recorded activity? Yet it will no longer collate these two figures?

also, I recently walked 12,000 steps and it said that this equates to 200 calories burnt which is far off what it would typically estimate this level of walking as. I have updated my watch