Why does my Xbox keep losing connection to my controller and internet at the same time?

Have you checked you router and have you updated your controller?

I know why my internet keeps disconnecting. What im saying is my controller disconnects when i lose connection. It will reconnect but on rare occasions it will not turn back on. Dont worry about the wifi part. All I need to know is if the controllers are
supposed to drop conneection and then reconnect when the xbox all of a sudden loses internet connection. I dont lose control of the wifi.

Thats the weird part, the signal from wi-fi and connection to the router keeps the same, it justs lose the connection to the internet.

In AUTO mode it loses the IP address and DHCP error appears and in static mode it just loses the internet connection. But the connection to the router, the Wireless keeps the same.

i will test it on my brother in law's xbox one to see if it happens as on my one.

I think I figured out the problem, I just don't know how to fix it. I think my Internet connection randomly slows or diss connects, thus losing connection with the server. I've had the same Internet for awhile and I've never had problems. Is there any settings
I can change to keep the high speed connection for extended times?

Also, when I lose connection and do a connection test, the Xbox will not connect to my router. It essentially is losing my router every time I try to do something that uses the Internet.