Default [Q] DN3(Ditto Note 3.2) on N7100 freezes


I flashed DN3 3.2 on Note 2 (N7100) about 3 weeks (update from stock 4.2.1.) with MJ5 Bootloader installation, full wipes etc (according to instruction in developer thread). Suddenly phone started to freeze several days ago one time a day: I cannot do anything in app, only switch them. Only reboot helps. It happens not in particular app.

Could you please help on this issue?

Thank you!