Lag, dismounted and after dying banned

Hello,
I really don't know what happened, but i was in Sholazar Basin, i got lag and was dismounted and i died on falling. When i wanted to resurect at my corpse, i got disconnected and then i couldn't reconnect becouse my Account is disabled, on this page i have that i'm banned and something Sentinel anti-cheat. I swear to god, i wasn't cheating or i don't know what should i imagine i was doing or what happened.
Can someone explain me, what happened and why i got banned ???