So this bug was found out by me walking in a multiplayer world on the snapshot then soon when I broke a block under a Lilac it dropped 2 Lilacs. When I kept testing it out it got me tons of flowers and it works with any two tall flowers and also the two high grass. The way to duplicate them is just plant them on dirt break the dirt and two comes out.
Related issues
is duplicated by
MC-63015
Double tall flower dupe bug
MC-65203
Flower dupe glitch
MC-67537
When mining a block with a sunflower on top it duplicates
MC-68560
Two-Block Tall Flowers Drop Two Items When Block Below them is Broken
MC-68965
Dupe Sunflowers
MC-70429
Breaking the block a rose is planted on drops 2 entity items of it (duplication)
MC-71286
Tall flower duplicating bug
MC-71425
Sunflower Dupe Bug
MC-71451
Flower Duplication Glitch, Break Block under 2 block tall flowers
MC-71963
Doubbeling 2-high flowers
MC-72186
Double height flowers duplication
MC-72281
Peony duplicates when block under peony is broken
MC-72486
Breaking the block below a double-tall plant duplicates the plant
Comments
galaxy_2alex
migrated
Confirmed for 1.8-pre3
migrated
confirmed for the 1.8 release
Erik Broes
Confirmed