rapid shot lag/delay when trying to shoot

hi,
Is it intentional that rapid shot skill for the Mercenary take 2 seconds (not reloading) before it starts to shoot? For example; I use Galvanic shards, then when i want to do single target attack, i switch to rapid shot, but it take 2 seconds to start shooting..when using other skills, those other skills do not have that lag/delay. On rapidshot i have 3 link, auto-reload, fresh clip, and overpower support gems. It is quite annoying, but wanted to get some clarification on this issue.

1) Please let me know if that is the intention of the game.
2) If this is how the skill works, is there a way to mitigate it? using more attack speed nodes? more cooldown nodes?

Thanks for reading and i appreciat your assistance on this.

I have the same problem. Any solution?

It is happening to me too. It takes 2 to 3 seconds for the mercenary to shoot after hitting the button. I was using fragmentation rounds.