In the field "notes" of any type of record the text comes in different font sizes, i.e. some lines have small font, some lines below have a lartger font, then back again to a smaller one and so on...
1Password Version: Mac: 1Password 7 7.6; iPhone: 1Password 7.6.2
Extension Version: Safari 7.6
OS Version: OS X 10.13.6 and iOS 13.6
Sync Type: Dropbox