Setting offerToReceiveAudio:true and offerToReceiveVideo:true before creating offer peerConnection.createOffer() is now deprecated and Safari does not support already it. We need to use new way peerConnection.addTransceiver('audio') and peerConnection.addTransceiver('video') but it breaks communication with opponent which uses AdapterJS. Both sides will only see own local video. Side using AdapterJS fails with error during creating answer. Could it be fixed?