I am 17 an have been going to NO all my life, and have only noticed it be dropped twice, once the elderly priest put it too close to the tips of my fingers and it tumbled off, the second time we noticed one to be on the ground around the time of the Lamb of God/Lord I am not worthy… part, no idea how it got there (or when) possibly when the priest put a ciborium to the side (where I am, Cup and Host 1 are usually given the chalice and ciborium immediately after those two have received the cup so that the choir can receive communion while the EMHCs and altar servers do, and the EMHCs recieve the vessels, and our altar is shaped kind of like the outline of 1/2 a hexagon so there are two “wings” closer to the EMCHs than the main part used during the mass).