I ran into the following problem today. I was adding a Social Security Number entry today, and had a playlist on Google Play Music running in the background. Every time a new title came up in the playlist, 1Password locked. Right inbetween me editing. After unlocking with the master password, I was back where I was before the lock happend (editing in the Notes of the SSN entry). After pushing the OK button, the whole entry was gone and I had to start all over.
Second time around I was a bit smarter and saved early (lots of long numbers to enter here in Switzerland), though again while editing the notes a new title came up in the playlist and 1Password locked again. After entering the master password again, I was back editing the Notes section of the SSN entry, and pushing the OK button brought me back to the main screen of the SSN entry, but hitting the SAVE Button ended in an error message, that it couldn't save the entry and I should cancel and open it again. Which I did (though not without copying the text I had in the Notes section beforehand). I went back in and pasted the text into the notes section and pushed OK and then save and everything was fine (thanks to no track change in the playlist during that time).
I hope this description is detailed enough. If anything is unclear to you or need more information, let me know. Happy to help.
1Password Version: 4.5b2 (20150605)
Extension Version: Not Provided
OS Version: Android 5.1.1 (Nexus 5)
Sync Type: Dropbox