Dead on server but not client
Sometimes on servers with high latency there is a desync with death between client and server. The server will say you are dead but the client still appears to be alive. When the client tries to move they get pushed back into the place of their death. The client can't do anything until they hit "use" and respawn on the server.
This bug happened to me once before on a European server and recently happened to dewww on an American server.