Strength issue related to multiplayer and PvP

When a player kills another player and the killer has a too high strength level (for example 114 or 115), the player that got killed sees his death message, but he only gets half a heart of damage appreantly, but after that he loses server sincronization until he receives the death (it takes a long long time), if that player (the one who died( disconnects and connects again (relogs), then it shows he died.