Bukkit

What steps will reproduce the problem?
1. I try to use fly boots
2. i dooble tap it
3. it fly for a bit and then you fall down

What is the expected output? What do you see instead?
I expected the boots to fly a long time , Now they only fly for 3 seconds

What version of the product are you using?
The last one

Do you have an error log of what happened?
No

Please provide any additional information below.