Same thing happening to me. Sometimes when it kicks me I get the "Do you own this game or app" message. Then I have to restart xbox.
I'm having the same issue on PC, ever since release.
I can play TDM or Blackout without issues, but every time there's a side change (like in Domination or S&D), I get "connection interrupted" when I attempt to spawn.
Game says I'm connected to the servers, good connection and open NAT.
I was able to fix this through my router, yes. I checked the connection settings, one by one, and their effect on the game.
Also, if you’re running any „tweak“ to your machine‘s settings, revert those to default (like Nagle‘s algorithm and the like).
Its not the game‘s fault, it just seems to be the only game to show the issue exists.