Default [Q] Cubot one s deep sleep stuck - newer firmware?

Hy, i have problem with Cubot one s

It goes to some kind of deep spleep, turns off and no way of turning it on until i remove the battery. It does it 3-4 times a day

Is there a newer firmware availible for cubot one s

My versions are 4.2.2
Moly.WR8.W1315.MD.WG.MP.V5.P4
2013/10/14

Core
3.4.5

G820_D1_CUBOT_V0.5_20140219

Custom build
1393995915