I am playing on some ancient laptop right now and mobile modem, and I pretty sure that it is the reason for my troubles. Especially given that I never encounter these on desktop and cable. But still I wonder if it can be fixed somehow.

So, here's what happens:
I use 'pounce' ability.
The class points is lost.
The cooldown is activeted.
But the ability is just not applies.
And this happens over and over.
On five or so try I may manage to jump, but it do not makes me happy.

I have exactly same problem. Annoying to get killed because of that

Yep. It sure sucks.

Can someone from dev-team answer to this topic? Or at least take notice of that.
It's almost impossible to play berserker when such "glitch" appears.

It's because you're lagging. When you lag your skills don't work.

Its impossible. My average ping is 10 and it never goes over 25. But still have that problem.
I dont have that problem with every other class and skill, its just something wrong with that pounce.

The same thing here. Although my ping might be little higher. Still I have no troubles with any other skill.