I was GMing a game this evening, and I don't think this has happened before. I was trying to speak as an NPC, and wanted to use their journal entry so it would show their portrait. So rather than use /as, I opened the list and tried to select their name. I say tried, because every time I had it open, and one of my players said anything, the list closed. I have enough NPC names that I just couldn't reach the one I wanted before someone said something else. I don't think this is supposed to happen, and I have never seen it before.