My 43" uj6300 just updated to firmware version 0.4.7.50 and the apps can't buffer content anymore. It's as sluggish as dialup. The browser speedtest shows speeds of up to 200-300Mbps though. I tried powering it down and trying again with no luck. Is there a fix to this? Factory reset maybe? Alternatively, is there a way to roll back updates? It's frustrating that a smartTV can't stream content anymore