Vu+Duo freezing with new night build

Hi I have a problem with freezing box. I tested on 2 hardware, but it is same problem. I used clear installation and only oscam from feed. When I zapping programs, box sometimes freez and I must switch off from power. It is only my problem, or no?

I tested on OpenPLi-4.0-beta-vuduo-20140510_usb or last night build which is worst.

PS: On vu+solo is everythig ok.

Thanks for answer.