I'm not the only having this issue occur, i see in the forums other have this issues. The issue is the when my guild invite me to a group so I can play with them in cyrodiil and when I get close to them, they are invisible. I've this issue occur to me when I'm doing dungeons with my friends and i see them invisible. The way i fix the issue is to left the dungeon and travel to them;however, in cyrodiil you can't travel to player. I would appreciate if you guys look into this .
-Thank you.