Phone don't go to deep sleep after recharging

I have rooted my device using CF-Autoroot. It works OK from then and even goes to deep sleep normally, but when I charge my phone for a long time, I noticed after unplugging that it does not go to deep sleep at all till I restart it.
After that it goes to deep sleep mode again but once I recharge it back the same problem occurs.
My variant is N920CD

Any advice?
Thanks.