Board Thread:R2D - Bug Reports/@comment-26214874-20150331120243/@comment-25394521-20150331141327

Probably lag.

If your internet has problems, your character is probably displayed in a delayed manner to others, or in other words you're far away in your point of view but people with fortunate internet still see that you're not far away, giving them the ability to hit you from afar.

If your internet has no problems, just take note and message anyone available (or just follow this forum post).