Major ESP8266-12E Stability Issue
Your way of connecting it is correct. Be sure PS delivers at least 500mA.

The ESP8266 is notoriously unreliable. I saw your message on esp forum and if you look around on the named forum you'll find plenty of complaints about that.

I am using the 01 model and have same problem. After buying same model from different providers I was able to find one which works as it should. In my personal opinion what we get on dollar market are the chips which felt the QA testing after manufacturing. Don't get too frustrated.