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Similar situation with notes: I just added a note to a 1PW login on the Mac, and the moment I opened 1PW on my iPhone, a notification from Dropbox appeared on my Mac, saying that I have added a “conflicting copy” of band so-and-so to Dropbox. This happens reproducibly, and I don’t know why 1Password/Dropbox doesn’t seem to recognize that the entry on the Mac is newer than the one on the iPhone. If it weren’t for the “Show previously used passwords” button in 1Password on the Mac, I would have lost the newly created password. But this scenario is, of course, very rare in real life. However, when I change the password on the Mac while 1Password is open on my iPhone, then the old entry on the iPhone gets replaced properly. In fact, when I keep it open while opening 1Password on my iPhone, I can see the entry being overwritten on my Mac right in front of my eyes. And it happens regardless of whether I close 1Password on the Mac or keep it open. This happens even when I don’t go to the entry on the phone immediately but first go to Settings -> Sync -> Sync now, and then go to the entry. When I modify the password for a login in 1Password on my Mac, then leave the “edit” mode, wait for the change to sync with Dropbox, and then open 1Password on my iPhone, the change I just made on the Mac gets overwritten with the old 1Password entry on the iPhone. I’m using 1Password 6 standalone version 6.8.9 on macOS Mojave (but the same problem existed under High Sierra) and the latest version of 1Password on iOS on an iPhone X. Here’s a phenomenon I noticed several weeks ago, and it still exists today:
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