If I generate an entry from this DOI:

http://dx.doi.org/10.1016/j.engappai.2016.01.001

delete the journal title, and click the "Update bibliographic information from the web" button, and select either MathSciNet or SAO/NASA..., then Jabref can't restore the title, and there's a message in the lower left corner saying it couldn't find any bibliographic info:

Am I using the feature correctly?

This is on:

 JabRef 3.8.1 windows 7 6.1 amd64  Java 1.8.0_111