Hi Minh,
I mentioned this over on the Dev forum. Looks like it was a file glitch as it can't be reproduced. It did flag up another bug and there were some recommendations made on documentation, but I don't think this needs more action. I am sure there are others items on this forum in need of much greater attention.
I didn't get a definitive answer but I have a feeling the schedules are supposed to always show the entire element for consistency in the listed / calculated data e.g. surface areas etc.
Thank you for enquiring.
Trevor
Apple iMac Intel i9 / macOS Sonoma / AC27UKI (most recent builds.. if they work)