A large percentage/amount of games experience the same type of lag. Ammo suddenly stops going down, grenades can’t be thrown (animation happens but nothing else), can exit the map without dying, and every player besides yourself starts walking and doesn’t stop, continuing into walls.
When this happens in Warzone, it often results in the REQ system no longer functioning and doesn’t let me use any cards or swap them.
It also will kick me out of the game after a certain period of time, claiming “the request to join timed out”. When this happens I am brought back to the main menu and lose whatever Boost card was active at the time.
Also, if it helps at all, I live in Massachusetts, USA.
This has happened to me as well on the west coast, it’s very annoying since it’s kicked me out of two games that I was winning.