I am having the same issue with Battlefield 1 and Battefield 4 on Xbox One for the last few days..
all non ea games fine.. my PC, and WIFI devices are fine,
I reset everything didnt help, I called my ISP for support, they tested my connection and it is fine.
netflix, youtube etc work perfectly..
all other games are also working perfectly..
it is EA,
BF1 and BF4 connecting..
or if it does manage to connect and allow me to get into a server the servers are just suddenly dropping all players randomly..
I go back to the multiplayer screen to find that same server and there are now 0 players in it..
so there is something up with the servers for sure, it has been happening for several days now..
Are you under DDOS atack?
