FYI: when I quickly type three or more tags to add to an item, the tags start to disappear. I.e., the second tag disappears when I type the third, or the third, when I type the fourth. If I pause, sometimes the disappearing tag comes back. But if I keep adding tags it’s gone for good. I assume it has something to do with the way Zotero saves data. Not a big deal, but I thought should let you know.