Lag/Getting Killed after Mobs is Dead

A very frustrating problem has occurred I have noticed only in the past two - three weeks I think. After a mob is apparently dead, no health left and your characters stops attacking, you can still get hit, several times or MORE! Just happend to me the other day with an A500 bot. I have seen this more and more recently. DOnt think its a local issue. Any thoughts....

This has happened to me as well, several times now. The mob has 0 health, my character stops attacking, but the mob is still standing up and hitting me. Trying to attack it again gives a "target is already dead" message. If it's dead why is it still damaging me? Ghost bullets from beyond the grave?