Default [Q] Problem with LMK on Note 3 LTE

Hi all and sorry for my English first.

I have a problem with LMK on my Note 3. Phone start killing tasks when ram is about 1000 mb free. Number of running apps in same time is max 6 or 7.

Currently using Omega v12 ROM and stock kernel.

What`s wrong with this phone?
Can enybody help please?