/uh timers hide doesn't work

Environment

• Minecraft version: 1.9
• Plateform used: Spigot
• Bukkit or Spigot version: http://prntscr.com/b6xbjz
• Plugin version: http://prntscr.com/b6xbow
• Plugin build number: Lastest

Problem description

Title

Steps to reproduce

/uh timers add 01:00 test
/uh timers start test
/uh timers hide test

Nothing will happen