I use 1Password on a couple of Macs running Yosemite with 2 vaults, and sync my primary Vault to my Samsung Note 4 via Dropbox.
I was trying to retrieve a password today from my phone and wasn't able to find it even though it was clearly on my computer, things were syncing just fine, etc. After mucking around between my phone and computer I think I have a repeatable process which shows some sort of bug when you convert a password to a login item and it not getting synced back correctly to Android.
For further proof, you can do something like:
Let me know if I can provide any other help or information. Thanks!