Stealth mechanics in ME3 and ME2

So. My favorite class in ME series is Infiltrator. I did blind runs as him on Insanity in both ME2 an ME3. As such I had a lot to do with cloak/stealth/invis. And I had to notice some hard bs going on.

In ME2 cloak was, well, rendering you invisible. Fully and undeniably. My first Praetorian fight consisted of 30 mins of running around in cloak, and 10 mins of other stuff. I could run next to collectors without any trouble, they were just searching around for me. It was great utility and damage tool.

What about ME3? Well, my first reaction when I used cloak was "Wtf just killed me and why". Enemies are looking like they do not give 2 shits about the fact that I'm invisible, and they will shoot me. While I'm mobile. From 50 meters. Lethally. And the greatest part is, that it is not happening always. It happens 50% of the time, sometimes mobs will just deaggro and stand still, or focus my teammates. In both SP and MP.
Now here is my question: Is the case of my game being broken, or is that actually the case?

yeah i think the aggro pool for the cloak is fucked up

I read a post by a Bioware Dev over on BSN who said that there are a few of cases when enemies will attack you while you are in cloak.
1. - If you cloak while moving and taking fire, mobs will 'track' you for around 0.5s, then loss aggro.
2. - Mobs can 'hear' noises that your character makes if you get too close them, causing them to attack through cloak.
3. - If you are the only player alive, mobs will sometimes 'peak' at your location and move towards that location.

While I know that this applies for MP, it is quite likely that this applies to SP as well.

as an Infiltrator I find this terrible. Its really annoying when you go invisible and see the Blue Ravager Lasers tracking you from 50 meters away