Guild Wars 2

Sometimes, when I do an event (Shaterrer for example), I don’t have any chest in reward (no daily chest, no chest at all). I know that they are account bounded but it is not the problem.
The bug happen when i do the event with a character who is on the same map since several days.

It’s a well known issue alredy.
It’s happening because you’re “parking” the character there. It has been pointed and doesn’t look like it’s going to be fixed, so it must be intentional.
You’ll have to stop doing it.