I don’t think I’ve ever seen this problem being acknowledged, so I will bring this to light.
As of now, all CC skills (ex: Sleep, Ice Pike, etc.) can have their freeze duration refreshed, with little to no drawbacks.
This easily becomes a problem when you’re faced with multiple enemies who know these skills, as they can easily trap you for way longer than necessary. In addition, all monster skills seem to have no cooldown, as I have witnessed a Pink Chupaluka casting Sleep twice in just 5 seconds.
That’s all I have to say about these skills. Hopefully everyone takes this concern of mine with great consideration.

For the aggressive mobs however, I usually just jump away from them and only attack after they have cast their CC skill.