First up, the popup menu is very helpful but has some UX problems.
Standard browsers like Firefox, Chrome, Safari, etc sometimtes show up their own pop-out menu in a form.
This behaviour should always be respected by an extension and check if the location of its own overlay should be placed elsewhere, e.g. above/below the browser menu, or show the inline icon in the form field.
It also happens when the browser has it's own password filling active.
The other issue is that if you have multiple logins to a form and the browser cookie remembers the username and autofills it, Enpass should pre-select this entry or move it to the top list.
The correct entry is not even visible since its the fourth entry.
This is really annoying and should be ordered by at least "last used" or "last updated".