Open Radar

 
Summary:
When you select a text in Safari or anywhere else and then right-click and select the "Look up" popup menu the Dictionary will be displayed. Then if you select a work inside the dictionary and then right-click again and select "Look up" again the the dictionary popup closes and the selected work remain floating on screen (see attachments).

Steps to Reproduce:
1. open Safari on any web page, e.g.: http://www.viggiosoft.com/blog/blog/2014/08/05/social-login-with-cocoa-and-cocoa-touch/
2. select any english word and right click on it, then select the "Look up <word>" menu: the dictionary with opened to the selected work will popup (see "bug1.png" attachment)
3. then from the dictionary popup select another word, right-click and select "Look up <new word>" again
4. the dictionary will close and the new word will be displayed only highlighted and floating on the screen (see "bug2.png" attachment)

Expected Results:
I would expect in step (4) of the description above a new lookup dictionary to open or, at least, the same lookup popup to replace its content with the dictionary result of the new search

Actual Results:
A weird effect instead is displayed, where the popup is closed and the select work remains highlighted and floating in the middle of the screen.

Version:
10.10.1