I have built a lookup table, definition & automatic lookup.
I've set the definition to;
Min Matches - 1
Max Matches - 1
Default Matches - None
The additional lookup fields appear in the appear data as expected with 1 result having the value of "None". However, when I click the "None" value it appears as no results found. If I then add a wildcard value before the "*None", the one result in question appears.