Skill cast time lineage 2 olf's t-shirt

Hello guys.

I noticed that when I stand still and spam same skill (nuke/heal) that has shorter cooldown then cast time then every attack after the initial one have 1s longer cast time, so when I attack a mob with a nuke then I have to move every attack to remove that extended time.

I noticed on twich that better players have all skills in macros and they dont have the same problem.
Somewhere on internet I found something about it, that /useskillforce in macro remove this problem, but it did not work for me.

Anyone know how to get rid of this problem and can tell me, please ?