If you put a Comparator connected to a Furnace and try and use the Furnace the items will disappear in the Furnace.
MC-9487
Comparator Furnace
Resolved
Duplicate
0
Brandon
(Unassigned)
Unconfirmed
Snapshot 13w06a
Retrieved
Duplicate of MC-8022, please use the search function to see if your bug has already been submitted. Currently over 51% of tickets are being closed as duplicate.