When I died my character was still alive

When I was playing on a server for two people (the other person is the host) I died ... but probably not quite ... When I clicked the respawn button I was reborn in the same place where I died. I had all items and experience with me. There are no other inventory keep game rule turned on. After respawn, my character was sort of "handicapped". I could not open and place blocks, the elytra did not work. Terrified by this fact, I quickly left the server and wanted to enter again. However, this was not possible. As I was playing at that time only the number. The value of players shout be on zero before rejoining the server. It looked like a player-ghost. I restarted the game and tried to re-enter the server, but the ghost player was still on the server. Please help.