An item elevator comparator randomly double fires if you are reading the contents of a dropper located in a different chunk (dropper on one side of the chunk border and comparator on the other), this misfire causes a signal to be sent to now empty droppers which results in clicking (very annoying if you are trying to make a silent item elevator and can’t figure out why it’s not workin).

i accidentally created 3 out of 6 like this (in various orientations and configurations) in my testing world while trying to figure this out, so it’s quite easy to have this bug without realizing it, Just glad I finally checked with a chuck viewer pack!