[Q] OK Google Crashing

Hi everyone I have been flashing Roms for over a year or more now having a great time with it, have a question though I have been on the Omni Rom for a few moths now flashing the nightly at least once a week my last few flashes I have had OK Google going the problem is every time i say "OK Google" it responds understands what I have asked (as it writes it on the screen) then crashes. This happens every time and will not respond to the hot word till I reboot.
just to give full story my voice search will still work fine if I just press the microphone its only having a cow when I use the hotword. If anyone else has had this and fixed it please help.

thanks in advance