I have a Mi Box S, I use it with a projector. I connect my android tv by wifi to a TP-Link Router configured like Access Point. The wifi works fine all the time, but the problems come when I want to watch something in the Mi Box.
When I'm watching a YouTube video or a Netflix Tv Show, my wifi stops working in all of my devices. The ethernet works fine, it's only a wifi problem. This only happen with this device.
Does someone know why this is happening?
Try resetting your router to factory default depending on your router this might work. Now try connecting to WI-fi change each settings but always checking immediately to see if that particular change cause any problem with WI-fi.
"With the Router powered on, press and hold the WPS/RESET button (more than 10 seconds) until the SYS LED becomes quick-flash from slow-flash. Then release the button and wait the Router to reboot to its factory default settings. If you are on the management page, you could use the Factory Defaults function."