Oneplus one AUDIO BUG. Help plz topic

Hi I have a problem with my OnePlus one . when I make a call happens to me not to hear the other person when responds ( ringing hear them ) but If active and then off the speakerphone hear the audio properly . But when I get a call everything always works! Any solution? It happens to me only if I put the rom lollipop , coloros and rom 4.4 works fine.

Thanks

Alex:confused: