https://bugs.winehq.org/show_bug.cgi?id=37896
--- Comment #9 from winehq-bugzilla@richardpayne.name --- Just to clarify my previous comment.
Windows XP does not hide the edit control's contents when ES_MULTILINE is set but Windows 7 does.
So basically, running 1Password on WINE functions in the same way as running it on WinXP. Running it on WINE differs from how it runs on Win7.
Is this a bug in Windows 7 or a change in the specifications of the edit control?