The bug
When cloning multiple maps in a cartography table, taking the cloned map out will leave the slot blank, even though it can still make more maps. Clicking in that slot again will pick up a cloned map that was previously not visible.
Linked issues
Attachments
Comments 4
Not fixed in 1.14 Pre-Release 2. In fact, this led to a new duplication bug: MC-148185.
Confirmed in 19w05a and 19w06a.