Asia_Skyly wrote: »Those public dungeons that you mentioned, never had conquerer and slayer. Those are new and introduced in this patch.
I have the same problem. I completed Obsidian Scar and all it's achievements and it reset. Zeni had this to say:
"This is William from the ESO team! After further investigation, we have determined that this issue is a bug. Do not worry, this is simply a display error as a result of the recent patch. Rest assured, this will be fixed as soon as possible, I only ask that you please bear with us as our team works around the clock to provide a more permanent solution for this. I am very sorry for this inconvenience, and thank you for you continued patience and understanding."
I'm pretty sure this happened to a few other public dungeon achievements. Should be fixed soon.