Request Interlude Java server skill potion problem

Hello, I am using Interlude Java server and I am trying to create some new potions with higher skill id, but the main problem is when I spam this potion skills, the character is getting stuck few miliseconds everytime I use this skill. For example if you spawn in your skill list the skill from Greater Haste Potion and you start spam it, your character does not get stuck, it continue doing actions, but if I spawn the new skill with the same xml skill data as Greater Haste Potion, and I start spam it, the character is getting stuck for 5 miliseconds. Is there a place where I should edit something more about this?