Put the summary of the bug you're having here

What I expected to happen was...:
Right-clicking a sign with an empty hand or while holding anything other than dye material would not play the hand animation

What actually happened was...:
Right-clicking a sign plays the hand animation regardless of what the player is holding

Steps to Reproduce:
1. Place sign on block
2. Right click while looking at the sign with an empty hand
3. Hold various other items and right click the sign