Setting up Unifi Access Points

I have an Xfi Gateway and am trying to connect 3 Unifi 6Pro Access points with a cloud key. I was able to set up the access points and everything was working fine. After this initial set up the access points do not work for more than maybe 30 minutes a day. I have gone through this process many times and always the same result. 

When I initially set up the Xifinity Gateway, the access points worked for like 2 months than started to constantly lose connection like stated above.

Any ideas would be greatly appreciated.

Thank you.