macos – How can the app usage of a single category be greater than the total app usage of the day?

In the following screenshot from a Macbook Pro, you can see that the screen time of the whole day sums up to 6 hours and 36 minutes, but the screen time of a single category (in this case, the only category on that day) is greater:

How can that be? How is this data to be interpreted?

Running on macOS 13.3.