upcp removing chattr +i?

I always do chattr +i on exim.conf when I edit it to prevent accidently overwriting it. It seems that when cpanel issues an update now it removes the +i and overwrites the config. Is there a reason for this? It is rather annoying especially since cpanel's version accepts a bunch of crap ( such as invalid helo's ) that it shouldnt accept.

 

Thanks for the response chirpy. I figured that was the reason its just annoying since I usualy do everything from ssh and I hadnt backed up the conf with tha changes so had to redo it lol I guess I will just have to remember to do stuff like that thru whm so it doesnt get overwritten