I've got a late 2013 MBP and I've been encountering a very odd issue with wifi recently. Every time I move the laptop from one room to another I have to restart Safari because it doesn't detect an internet connection. For example, if I'm on Youtube in the family room, which is on the first floor, and I go upstairs to the bedroom and I still have youtube on in safari I have to restart the browser because I get a "Safari cannot open this page" error. What's weird is it only happens on whatever site I'm currently on, so youtube won't work but if I go to another site it works fine...it's so odd. I have no idea what could be causing this. Ultimately it's not a big deal because I just restart the browser and it's fine, I'm just curious as to why this could be happening.