Hi @Anonymous User
What's the wifi signal reception like on the stick ?
You should be able to see the wifi signal strength by going into the stick menu under settings, then network, then about.
If the signal strength shows poor than try a different wifi channel on your router, another HDMI port or a fly lead HDMI extender cable to see if the wifi signal strength improves.
Should you be getting a good to excellent wifi signal from the stick, then perhaps try powering down your router for 20 minutes to see if that makes any difference.
