Is this issue just with my game or did u got this too?

At the beginning, when you hop off the roof there are 2 soldiers sitting at a car. They see my but they dont get out, execpt i start shooting their car. Generally AI isnt very intelligent. They dont see me or just running the wrong way.

I hope Crytek will fix this very soon with next patch!
Did you guys out there experience similar problems?

I've not experienced anything too bad although one guy managed to detected me through a solid object AND cloaked...because he was facing me from 3ft away...

I've seen some problems with the AI, generally just stupid things which are easily overlooked however they do sometimes seem to ruin the atmosphere of the game a little. For example, once I saw some guy who had fallen somehow off a ledge on a roof and he was walking into the wall continuing his patrol.

It's also quite annoying how enemies don't seem to react to certain things such as I was hiding behind a car once and I power kicked it just short of him and he didn't even notice me..

Yep, clearly AI is not Crytek strongest advantage. It's the only thing that bothers me in Crysis 2. So thats why i play on the Hardest level. Much more challenging.