Xp sharing in group

Guffel001

I have noticed today that you don't get xp from mobs that group members kill anymore unless you have dealt a little bit of damage to them. Last week im pretty sure xp got shared like always (you didn't have to hit them to get xp as long as you were near your group member) now it seems buggy or did zos change something because i didn't read about it in the patchnotes. So does anybody know if it's a bug or intended?

Thanks for all replies C: