This topic should have been under the X5 section. This is the section for BuzzTV 5 which is the software running on the box.
If your router uses only a single SSID for both 2.4 and 5Ghz bands, check to see if there is a way to split it. Companies call it different things, in some cases "band steering". That way the router tries to steer the connection to the best option, but this can also cause issue with some devices. Splitting it, you will have 2 different WiFi SSID, one for 2.4Gh and another for 5Ghz. 5Ghz is typically faster, but shorter range. 2.4Ghz is slower, but longer range, and very often more stable.
What is your power key definition set to ? suspend, or shutdown ? Do yourself a favor and switch it to shutdown. Sure it takes an extra 30 seconds to boot, but you know you have a clean boot every time. suspend is not worth the potential headaches and instabilities cased by misbehaving drivers.