Using newest time capsule and Comcast. Speed test app says my internet is blazing, yet it still seems extremely slow on my devices. Will often stop working, will turn WiFi off and switch to LTE, works great. When I switch back, it usually starts working but still slow. Tried using Google DNS servers, any other ideas? Not sure if it's Comcast service or time capsule or what. Here's the speed test output: Ping 14ms, download 180 Mbps, upload 12 Mbps.