I clicked on a naturally generated with some items and they seem to go in the pot, when i break the pot the items with which i clicked with don't drop.
When i open a chest or click the slot they were in, the items appear back.

video: https://www.dropbox.com/scl/fi/hfh40yg5qxty23muwmcdh/2023-11-08-17-10-13.mp4?rlkey=q6lxp8wv4r9ie9myij9evdzwo&dl=0