This question goes to Minecraft players who are familiar with bugs?

Is there a coincidental one who knows the bug, where you can't be beaten by other players in PvP? How does he walk?

Call yourself, for example. High ping or hack client or admin

Well… Once you've been hit, you're immortal for a short time. On Mc servers, it's usually the same when you join and respawn. Otherwise, I would rather tap on the following things: hack client, higher ping, godmode or game mode. Such a bug is not known to me and since I have never heard of it, I doubt that it exists.