1. I have a Huawei Honor 6X running Nougat. 2. Messenger, WhatsApp and WeChat all run ok using speaker. 3. YouTube, media and phone run as normal with BT headset. Media within Messenger, WhatsApp and WeChat runs normally using BT sestet. 4. Problem is that Messenger, WhatsApp and WeChat all freeze when BT headset is used for video or voice calls. Call connects and app freezes after about 5 seconds. 5. Three different BT headsets used, all have the same issue. 6. I have rebooted and cleared cache, neither made a difference.