[Discussion] Is the absolutely cracked out now?

I have had AI shoot me before I am even visable to them, no warning, instantly dead. I've had them hide in corners for about 5 minutes making not a sound, not even a shuffle, then I walk by and Boom unloading on me. The only sound I ever hear is their gun firing. I peek corners and I'm instantly dead. I reposition and they know exactly where I am on first peek. Something is different and I can't put my finger on it.