Default Screen Freeze or Reboot of Device

Hi. Has anyone here using a G PRO F240K/S/L, flashed a Custom ROM like CM, VANIR have a problem with calling? Like when you call someone, the phone either freezes indefinitely(Like VANIR) or Reboots (Like CM)? And is there a solution for it??
Genius.

DEVICE: LG Optimus G Pro F240
ROM: VANIR 4.4.4


OTHER DEVICE:
Nokia X7 - MiG CFW 3.3