I already tried formating and doing a clean flash as well as restarting from MIUI but it just doesn't work.I think there is a mention about resetting the APN. Have you consider reverting back to MIUI and flashing back your way to Evolution, while wiping and cleaning data along the way?
I've noticed all my problems were fixed by data wiping and cleaning and only once, in the more severe malfunction, I had to revert back to MIUI and start fresh.
Obviously known bugs like overheating (previous build) are out of this scope.
I'm guessing our phones are basically the same. Therefore only external factors to the ROM, like programs, mods, hardware, can explain certain anomalies not common to other users.
These are just my 2 cents of experience.
This problem appears on some updates and disapears on others it's very strange and quite bothersome.
I started wondering if it had to do with my network provider because I live in france so I use a french provider called Bouygues Telecom.