I tried to attack a creeper in creative mode so it can explode, but it didn't. It does the same thing with whatever hostile mob. I thought it was the difficulty, but it was set to hard.
How to redo the bug:
-Spawn a hostile mob
-Attack it
-Nothing will happen
Duplicate of MC-15111, please use the search function to see if your bug has already been submitted. Currently over 56% of tickets are being closed as duplicate.