I was double-clicking on some words in an entry to look them up, and the double click resulted in strange selection.
When I double-clicked on fingere in the entry for "make", it selected all of these words:

In fact, double clicking on any words covered by that selection cause the same thing.
Similarly, double-clicking on other words in the same entry causes other strange selections:



Now, the look-up performed by the double-click is only for the word clicked on (which is correct), but the selection shouldn't be extended beyond that word.