I hope there is an option (perhaps a hidden preference) to disable autocompletion of recent values for a specific field.
An example: One of my fields records the volume information of ebooks. On one occasion I entered «2.1» which denotes first part of second volume. For all subsequent entries, autocompletion would suggest «2.1» when I just want a simple «2». That is not desirable behavior from the user’s perspective, because autocompletion actually increases the number of keystrokes required to complete an action.
My current solution is to set the field type to identifier, rather than single-line text. (Decimal number is not suitable in my case, because Chinese books usually use “上，中，下” (lit. upper, middle, lower) to denote volumes.) This, however, is not an intended use of the identifier type.
Thanks for considering!