You have to use the correct tool to break something in creative. Is this a bug, or a planned implemented feature?
But sometimes, it works perfectly fine.
MC-19752
Can Only Break Items With Proper Tool In Creative
Resolved
Duplicate
0
Joshua Sheldon
(Unassigned)
Unconfirmed
Minecraft 1.6.1
Retrieved
Duplicate of MC-18368, please use the search function to see if your bug has already been submitted. Currently over 57% of tickets are being closed as duplicate.