empty preferredText

[Miller, Timothy]

Hello,
I'm using the dictionary lookup (through ctakes-web-rest) and trying to read 
off the preferredText that comes back as a human-readable way to display the 
CUI. On a very small percentage, there does not seem to be any preferredText. 
Has anyone else encountered this? Is this a limitation of the underlying 
ontologies or a bug we can address?
Tim