Does anyone else find that they can only tag certain co-authors/colleagues in papers/projects and not others despite them being on Research gate? Is this something with their settings or mine? Obviously, this is not a big issue, I was just wondering (also I don't want to potentially offend anyone by tagging some people and not others- looks like favouritism. When I say tagging, I mean listing their name and linking it with their Research gate profile. I just asked one of my colleagues and he is not aware of why when I type his name, he doesn't appear. He would like to appear so that he doesn't have to enter the project details himself separately).