I had to quit 2 arena games because i was lagging every 3 seconds. Checked my internet speed everything is good. Connected to xbox live. I played other online games everything is good. Dunno what it is. Also tried warzone and it lags there too. I have time warner cable. My internet speed is 62.11 mbps, 11.75 mbps. 13 ping.
Had the same thing happen to me. Finished a BTB game a couple minutes ago and out of no where I was lagging really badly.