When double clicking on a string attribute value to edit it in the entry editor the full field is selected (on windows at least). At this point if you immediately click again (to position the cursor at a specific point within the field) the edit is cancelled. If you wait a bit before clicking again then the cursor is repositioned as expected.
Double clicking seems the most intuitive way of editing attribute values for me and if I just want to edit the text (rather than completely replace it) then I will tend to click a third time to position the cursor. It is a bit annoying to have to wait for double click time to end so I can click without the edit being cancelled.