Home network, BT Infinity FTTC. Normally trouble free until our son visits and uses his iPhone and Mac, all our devices are Windows/Android. When he is here my wife and I frequently lose internet access on our devices while he is working. Needs frequent reboot of the router to restore. He claims it must be the extra devices when he is home but I have disproved that by turning off cameras and Alexa devices, the problem persists and returns to normal when he leaves. As he will be home again for 10 days over Christmas I am looking for suggestions to allow a peaceful holiday!